Malicious PDF — malware analysis report

Static analysis result for SHA-256 67c3b2cecd169437…

MALICIOUS

PDF

74.4 KB Created: 2021-03-30 06:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 0c0cf39b49854df4c95c16805a88adf0 SHA-1: c59d7e24a206ccfeba39d86998ed4e8e05d1d858 SHA-256: 67c3b2cecd1694373647bd111f8fbd6d18d1a5127d394a1ae9961f4cd8c8d98e
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as a phishing trojan. Although no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a social engineering attack designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/123?utm_term=service+coordinator+resume+template PDF link annotation
    • http://xexisutufas.iblogger.org/73494097199.pdfIn PDF document text
    • https://cdn.sqhk.co/vewimidipiv/3NFPjbL/63005001065.pdfIn PDF document text
    • https://xosufovopoxom.weebly.com/uploads/1/3/5/2/135298930/ragenaz_pedutopokesabi_fasoxinavo.pdfIn PDF document text
    • https://cdn.sqhk.co/sanevujaguda/5Pibgfk/mcafee_security_for_t-_mobile_cost.pdfIn PDF document text
    • https://jagefebasedi.weebly.com/uploads/1/3/5/9/135993187/6074953.pdfIn PDF document text
    • http://gozaxirelu.iblogger.org/zatibeguwivekupadal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://50037ee0-0691-4a53-bdc2-b2f8f795cfa6.filesusr.com/ugd/b41a9a_2e3294949e6f459897ca4fc13b75daaa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/95e55e0c-03ac-4c4a-9594-4c1f138b108a/windows_loader_by_daz_1.9_7_download_zip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76d0e778-f380-44a7-b9fe-6b4d750bb9b1/qu_es_liderar_equipos_de_trabajo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a86a9c2-0c58-46d6-ac6d-7e28f9525cc4/pujebojowilexorapetaf.pdfIn PDF document text
    • http://fotafufoka.epizy.com/lipededugexaporuduwutotiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e4bc74c-8c96-4141-89d4-10a50c2e15db/dikaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd6762de-a27c-427a-b66a-39886ebd40a3/vizio_model_e480i-b2_wont_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7d706b9-1960-4d6e-9abc-7f47fe4f09cf/35094488414.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60c84d2e-7c81-4817-8274-78429dadc0a3/sisodanuratisoxikejewuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/355fed9b-74d8-4304-8f8e-e5ba9b589d74/rock_band_4_ps4_drum_kit.pdfIn PDF document text
    • https://b0cee159-9ce3-47d2-9452-de9e383f1b6b.filesusr.com/ugd/fac5c7_9eff956cd91447dab709c82515cdc68c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6d9927f-a1ed-4a51-ba5f-a31711c64311/assessment_commentary_edtpa_math.pdfIn PDF document text
    • https://9a4203bb-6ff2-4ef1-9c63-3f113f84a884.filesusr.com/ugd/ea9bdf_d0c58996b56542f19aff27c4b813cf6c.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_off0000e424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE424 5380 bytes
SHA-256: 30d6825f9262936d7fc4e7903ca00dd489abfae8d3690757b751a21ee21db01d
font_01_sfnt_off0000f65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65C 11360 bytes
SHA-256: e0f6a1b185d5efc28e435cbedb0f3aebfc78580fc2b82419d8147573c3675641