Malicious PDF — malware analysis report

Static analysis result for SHA-256 968f08d63761beec…

MALICIOUS

PDF

82.2 KB Created: 2021-09-07 07:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f2624c9ebf3df232ef74de56e0b63f10 SHA-1: fed456ae2bb6683bf97a8f8185f089eb3c1b41f4 SHA-256: 968f08d63761beec236087854604812f51f932f07902cc7cd7a06750b2f31593
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits a vulnerability or serves as a phishing lure. The file contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's designed to redirect users to malicious content or download further payloads. The presence of multiple distinct hosts and a link farm pattern indicates a deliberate effort to obscure the final destination or distribute malicious content across various compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/7s5dtl8m3t028n9gm94iej9fs1/nisuloxetixuke.pdf In PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5049b7144---45867419671.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/k38chqkn3r7pc7opacu0irhjmf/katejuru.pdfIn PDF document text
    • http://dominant.name/userfiles/file/23504908656.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/de5hhceoele950i6ddjn4co4gj/varesokekolujanik.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/aefc86e9380ce18c5afc89b059cbe722/jifabagekepog.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/gimigofosak.pdfIn PDF document text
    • http://agermag.ro/mm/file/51482402429.pdfIn PDF document text
    • http://siltherm.com/ckfinder/userfiles/files/vanalonojadatununukega.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/68357437353.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/munonusobakazowemubowel.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16117e5c9d3f7c---59913310460.pdfIn PDF document text
    • http://www.educazionesessuale-scuola.ch/ck/ckfinder/userfiles/files/98991441190.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c361e78825b---lokuligegawi.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd05a4a345---85398173233.pdfIn PDF document text
    • http://25630638.kad.tw/kads/ckfinder/userfiles/files/19647867416.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/75b6af9b77944b4274d65a0ce8f152fa/32109534122.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/p94afj7r6otd349bs3i9gknt24/416895233.pdfIn PDF document text
    • https://steammining.com/userfiles/file/10687819173.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc9096df42---81653903260.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9440f1428b---zefufu.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/1a65ce99fd98f3fd097141989d6a67e1/96231046683.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/23621558506.pdfIn PDF document text
    • https://nistd.in/userfiles/file/paliro.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/a5951044ed680e3f8197e2a6ab6a405e/12693500493.pdfIn PDF document text
    • http://premsaktidal.in/userfiles/file/45092685024.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=el+modelo+pedagogico+constructivista+pdfPDF 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_off0000d7e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF9 18600 bytes
SHA-256: 56d5381d88bf7fff2862bf9b3dee9afe49d3aa76c25444a54094eb56ee03c31e
font_02_sfnt_off00011f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F49 11112 bytes
SHA-256: 6c401a376e9562adccd1c66a8d13a562aa06e525783196ac4f6db4df0bdfd145

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