Malicious PDF — malware analysis report

Static analysis result for SHA-256 b85db1fead4e45ab…

MALICIOUS

PDF

103.0 KB Created: 2021-06-26 21:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 8edaa4bfc20cabddcb77661efb44c8b8 SHA-1: 8baf5d231b062cc2745e8293fb949d0bb7b5cfcb SHA-256: b85db1fead4e45ab2091525f9dd950fd819faadf0ff8f43aada43e8ccd294bfa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or obfuscation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9685

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b4cd7a0cb---tazopemezepunide.pdf In PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac33e60fe14---96081205418.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/05d3r20kgr647rar6mvi7vvup1/fatasepabodapebuxijowe.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/77lg9rbskibs4k7bf654mdje4s/zukapesomiv.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/82188599618.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e1eeab8bc---dolebisirimajuzuwi.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/97223565046.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/29024329d329aac8eae763311789a316/24322547346.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16078f8291f54b---nibofesufidibuv.pdfIn PDF document text
    • http://bakoca.hu/files/file/96724124098.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/u7omd24psipi01ep3kubhna06r/1310895561.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/e2067b8f6ba66f64aa79c60bfc79da86/lakejivowexuzuwud.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/42857751944.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/c81ff857e39a69c1762bbce963788731/58551824283.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073f4a92667a---76970275131.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607834d7bceee---19790168091.pdfIn PDF document text
    • http://ambvetbrashersclavoghisu.eu/userfiles/files/bojuda.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/k2uh4vno7mskm3g8dg7jsnqilv/22878569566.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/hvkcpvfv7dravkh3mibb0vamdf/64769344299.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16077d842c5792---tusagubajemuwifit.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/94894863992.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6fd621a52f---29247772794.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/3698c06f0b7bd6ad4e51e9f605919507/pabodiredawega.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7fc31b833---50714127898.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/3b4792b3dba2c0f479ab967256a3e8d6/85304059266.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/tejafolukemexobe.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/2715408060.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=dua+for+general+protectionPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000fe3f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFE3F 26208 bytes
SHA-256: b52e44940cbebb88d2ebdd13a9c9132b4295749803237cd9068d9897399c7695
font_01_sfnt_off00012e25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E25 10588 bytes
SHA-256: 5065e770e8c7ceb7c3e84d684d8fb7d951cad30753a1b97a25921b79c50c8cf1
font_02_sfnt_off0001466d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1466D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E7F 17456 bytes
SHA-256: 7bd955d410abe6be7569f04c47383ace76ac3a8447046b381a4b133f4a6f61e2

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