Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf171c016c23d0c…

MALICIOUS

PDF

79.9 KB Created: 2021-04-03 20:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a6085146edd44f68b3fd18c38894bcc3 SHA-1: f3ca1033346fcdae6627dacbafb49643fb57555e SHA-256: 8bf171c016c23d0c9160da22fd091af10fe42576e0597b0f9c2b63d129be52d1
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Internal Spearphishing T1059.007 JavaScript T1204.001 Malicious Link T1071.001 Web Protocols

This PDF file is identified as a credential phishing lure, impersonating Apple to trick users into clicking a link. The document contains a mass external link farm hosted on disposable domains, with one primary URL leading to a redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to harvest user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 8

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://xegubivagemegi.weebly.com/uploads/1/3/4/4/134481439/7289705.pdf.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://lozipotod.ru/strik?utm_term=davis+drug+book+free PDF link annotation
    • https://xegubivagemegi.weebly.com/uploads/1/3/4/4/134481439/7289705.pdfIn PDF document text
    • https://palozemoxapido.weebly.com/uploads/1/3/4/3/134366311/18c873022c.pdfIn PDF document text
    • http://disclosures.space/majosokotaxezeporalowowu5jfqg.pdfIn PDF document text
    • https://puziwifatewir.weebly.com/uploads/1/3/4/7/134715637/fasivuje.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/alimentos_con_carbohidratos_simples_y_complejos.pdfIn PDF document text
    • https://sikufotoxatufik.weebly.com/uploads/1/3/4/4/134458503/eb8ef9.pdfIn PDF document text
    • https://veraroligesabo.weebly.com/uploads/1/3/4/3/134377370/bipomesibufin.pdfIn PDF document text
    • https://pememeva.weebly.com/uploads/1/3/0/8/130874233/628a951.pdfIn PDF document text
    • https://pemopexo.weebly.com/uploads/1/3/4/3/134305592/zudelaga_detesurubu_zuwosag_jozigazobev.pdfIn PDF document text
    • http://kifopelidito.mypressonline.com/cules_son_los_sntomas_de_pncreas_inflamado.pdfIn PDF document text
    • http://minuette.me/37791034240mg5lc.pdfIn PDF document text
    • http://www19216801.site/final_fantasy_7_walkthrough_dons_mansiondw3ya.pdfIn PDF document text
    • http://jewofuvivonog.getenjoyment.net/42561177555.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/zugajed.pdfIn PDF document text
    • https://fotelosalif.weebly.com/uploads/1/3/4/4/134463398/eb7ee.pdfIn PDF document text
    • https://nemabofafuz.weebly.com/uploads/1/3/5/3/135389169/2119354.pdfIn PDF document text
    • https://zugufirit.weebly.com/uploads/1/3/1/1/131163535/ae82d7df862.pdfIn PDF document text
    • https://nujalujuxak.weebly.com/uploads/1/3/5/3/135347358/pewapa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/27df49ac-947a-4d67-a00e-01dcdcb1469d/white_christmas_song_fast_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bf6cece-5659-4dcf-a8d8-49320fa2b7b6/adding_and_subtracting_fractions_with_like_denominators_word_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6dad741-c503-4cad-bad3-b0c1a761dc35/6726597566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa880baf-2743-4245-a7d6-e3298a3a9856/34490162899.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4a815d1-e041-4ab6-8b2e-f9edbd1cd10f/how_to_cancel_sports_illustrated_magazine.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95A 5304 bytes
SHA-256: a63302908ddb996c2df4df032ba9cfd852b3724fd8f14425f30fe46335d5199b
font_01_sfnt_off00010b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B82 11652 bytes
SHA-256: 16796023ab63440c419efe7e2b1a074f5a24d73f1236a5b2ce5739c16e4c9c27

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