Malicious PDF — malware analysis report

Static analysis result for SHA-256 86701ede52ed696c…

MALICIOUS

PDF

78.1 KB Created: 2021-03-25 15:52:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b08c6e917709503fc1af996068be9821 SHA-1: b6fb111e9a906abecaff9b0a7360d72208e18c47 SHA-256: 86701ede52ed696ca2f08e4f80aa0fab6217f03651596597d7bfdc76a39f6e40
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URL 'https://midufefew.ru/award?keyword=soluciones+hipertonicas+ejemplos+pdf' is suspicious and likely leads to a malicious site, while other links appear to be part of a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://midufefew.ru/award?keyword=soluciones+hipertonicas+ejemplos+pdf PDF link annotation
    • https://cdn.sqhk.co/gosukutusu/hbAghgi/2272198074.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/hbibhgc/87528995614.pdfIn PDF document text
    • https://cdn.sqhk.co/misusulebix/dhegiL3/best_friends_forever_game_characters.pdfIn PDF document text
    • https://cdn.sqhk.co/givifevulo/jajcRgg/95626272507.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://78fc25e8-d533-4ec3-a480-3617e8cc0d4b.filesusr.com/ugd/aa5866_d307ce817b164511922e15b755f59c0c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/suxiweke/skype_interview_questions_and_answers_for_freshers.pdfIn PDF document text
    • https://59b7e61f-9850-45ee-add2-e9646db267e4.filesusr.com/ugd/5b9365_5f422dc99c5a485ebe53c6f45e27c61d.pdf?index=trueIn PDF document text
    • https://d787a32c-196b-4e99-9c98-3ae3c28023f9.filesusr.com/ugd/05b469_e7f61461983543eb8f213ef8c719787c.pdf?index=trueIn PDF document text
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_b019e6b6c2be46c6872f257c8810e32c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/33553b82-b1b5-40eb-80dd-d85c076ea5ca/whirlpool_water_softener_parts_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00dd355c-2a94-4d6f-b10a-4f36c1d9cbe8/bakawuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1816c77d-a28b-4fb0-8d44-77bb7c288802/the_spectacular_now_book.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/sagezuvumevurosafadan.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/65533657314.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/12478408047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1812bc8f-65b8-41c3-94e2-a16753986124/95521598668.pdfIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_654bca657e9d4cfa90d49b175f680ee4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c0c6465-5578-460b-93f4-a2fb263c377c/vixurizaziputanoxijajif.pdfIn PDF document text
    • https://c18d9829-3add-4afa-bc87-35007fe3998a.filesusr.com/ugd/70c1ec_4039b3b74e084b249aa2e289da2b476d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/62969e10-da7e-473a-ba69-1b0404a4ed67/garrett_ace_400_metal_detector_review.pdfIn PDF document text
    • https://36fc1fe3-b646-4cc1-b6e9-de51469aea27.filesusr.com/ugd/3eb4bd_cfbc301f74da451f8234082c83950b30.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/91dd205a-2f4d-4722-b77f-c8a6f21649aa/farmall_super_a_attachments_for_sale.pdfIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_52278e201ca84d10a24096eef84d5f38.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF253 5572 bytes
SHA-256: 9034d596def2aaf4a804302e7781cbcfa748ba282053838fc1cbd804f7e80f7c
font_01_sfnt_off00010523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10523 11232 bytes
SHA-256: 553268b64f31809c98a9b10f0a9aab12694f7f978904fd0e23e9e2f3ef734332

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