Malicious PDF — malware analysis report

Static analysis result for SHA-256 1325291b7d50edb3…

MALICIOUS

PDF

88.6 KB Created: 2021-06-27 03:35:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: f68b66d1e3e4383cb7c9e0f86d9adbfa SHA-1: a591f8384f2cf12bc5b3fc61db544716a0761888 SHA-256: 1325291b7d50edb3eff4ad4ac7cdee1f5a20a9533b649ac9c36c5a56a49a0916
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload locations and an IP address, likely to distribute further malware or conduct phishing. Although no scripts were explicitly extracted, the PDF structure and URI findings strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://sweetbasketsbyjackie.com/clients/864293/File/98100444088.pdf In PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16074b72d13df6---62484498575.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1609533a32e248---84840981131.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16097338a229e9---15730000754.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2afb35b2b---93537812470.pdfPDF link annotation
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/434b94d28e597842b755a4c63491750c/bajafu.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082858e4dde9---91128410511.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/57011551886.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/d15917f94f12c86940a7310d30a69f57/49349077571.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/52104736669.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/9cbe44c5ad190ba595d9f5a38a898955/1144683665.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607edfa437db9---55832817935.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/b6185d6152b8d82e4cc79fa4c4a64097/4896708767.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/63777499863.pdfIn PDF document text
    • http://gesundimjob.at/images/content/files/44428607676.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210531_29846A602A912242.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/rezijipinopumabakukisin.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/file/11402350800.pdfIn PDF document text
    • http://jameshamiltondds.com/clients/6/6c/6cc67b5d90347a591bf4e9c0b97a5143/File/14244380818.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160769b3d190e1---13343805499.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/a1e4c27e6da39b92a163165b7d4d0a14/fesiduxedalilixu.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d0fd3681e---joxulavi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=tell+me+about+yourself+medical+school+sample+answerPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F7 16836 bytes
SHA-256: ed6ca5fc5aabd05d4d7b9f5378aa2c7dc6f1d364876bbdc834c199627ac79a2a
font_01_sfnt_off00012297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12297 11288 bytes
SHA-256: 29a1434572b2ced4e9762338352add5f9298bef21d24189efa2c5106492c48a6
font_02_sfnt_off00013cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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