Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f59fa27fe2c4fe…

MALICIOUS

PDF

99.4 KB Created: 2021-03-19 16:29:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 334e0130e25a29023d17e79d31f3f914 SHA-1: 26edc891c3f1b2fecbd0522cd4f55cb25a1c6388 SHA-256: f2f59fa27fe2c4fe8d105703f065414a66da57c4362128bd9e4cef4aaf71cae7
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious by ClamAV and an ML classifier, and contains a large number of external links, many of which are on disposable hosting. The document body, though heavily obfuscated, appears to be a lure related to fixing a Bissell vacuum cleaner, directing users to external URLs. The presence of numerous links suggests a link farm or phishing attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/aws?utm_term=how+to+fix+suction+on+bissell+proheat+2x PDF link annotation
    • https://fezekisovo.weebly.com/uploads/1/3/4/6/134661064/f3c01540ce761a7.pdfIn PDF document text
    • http://com-servers.online/pogafellugde.pdfIn PDF document text
    • http://habercigo.com/1657185917nmxte.pdfIn PDF document text
    • http://sk-anker.ru/c_notes_for_beginners_in_hindiqq7pe.pdfIn PDF document text
    • https://kijojodifufu.weebly.com/uploads/1/3/4/3/134317180/nelagedetelup_nujot_vamifujogonipaf.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/1789140872riezs.pdfIn PDF document text
    • https://zitudoxe.weebly.com/uploads/1/3/1/4/131437236/sifunar-wapagizurobum-kaxidato.pdfIn PDF document text
    • https://sawulazu.weebly.com/uploads/1/3/4/5/134588127/2038704.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://a79fbd7c-12a6-44fe-9d3c-43dc2b0795a8.filesusr.com/ugd/f95141_9b6b169e2d03436d86f1813c2b7c5e7d.pdf?index=trueIn PDF document text
    • https://4ac36a2f-1533-488b-b282-cf34cdace458.filesusr.com/ugd/bcfc12_de03b1cf98d444859a8942fe52605b95.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8d947eb-2ba0-4542-8b42-2651d0ecc7e0/9774139735.pdfIn PDF document text
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_ffc9b12127f8431b9c0574ed10fb18e4.pdf?index=trueIn PDF document text
    • https://469ee322-798e-4c1d-9571-af6764901f97.filesusr.com/ugd/57169b_d81e4b03ec4c4909b7167f80b0e9ef4c.pdf?index=trueIn PDF document text
    • https://cceb078e-1df6-42b0-9e12-359f30e42f1d.filesusr.com/ugd/e8506d_95516c30ba23436ea128e3747e12d23b.pdf?index=trueIn PDF document text
    • https://b2fc43c4-60ab-4dc1-a1c8-84833fda4e2a.filesusr.com/ugd/37321e_40a76650fe774e57ad5ede8dceea73b9.pdf?index=trueIn PDF document text
    • https://b2f3f1fb-4f3f-4d5d-be65-f5b10dce6288.filesusr.com/ugd/735189_80fae7fa7eeb4719871f114a1db0f3a9.pdf?index=trueIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_eff5a8ae75bd4b4aa6f7bad3af53b2ac.pdf?index=trueIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_c7eb6b9651ae47df990451d3c865f7bb.pdf?index=trueIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_df89bf694feb4ae0917a53f67653b050.pdf?index=trueIn PDF document text
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_00a7ba2633ea442b8f813161f78d99a4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd67cee4-08bd-45ad-bc0b-b3b6ba8118d9/why_do_i_wake_up_from_my_dreams.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13715 5376 bytes
SHA-256: edd965c9212fceac71bd012124c8bc170655ed60c9a30b8ab797c3486a61bad7
font_01_sfnt_off0001495d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1495D 11488 bytes
SHA-256: 220fcd738c09a02a2e3cac9818cbb166d2f9f6af24229b9a4cb908bb5b0af09c
font_02_sfnt_off00017042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17042 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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