Malicious PDF — malware analysis report

Static analysis result for SHA-256 65006cbf7a5d09a9…

MALICIOUS

PDF

67.4 KB Created: 2021-03-23 09:28:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1afe8e28d915425e04cb5c769fc71e7b SHA-1: 36cb3b8ec30b4a5e4fd920286a5fe024329779df SHA-256: 65006cbf7a5d09a92d43baedefb2a95903b72d858ecc619b5f439162a31be647
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://golowaki.ru/wix?keyword=og+tube+apk PDF link annotation
    • http://mipexalazalekab.getenjoyment.net/42371728313.pdfIn PDF document text
    • http://tuwasukam.getenjoyment.net/how_do_you_write_an_impact_statement_for_a_car_accident.pdfIn PDF document text
    • http://nusowutevu.getenjoyment.net/hp_deskjet_ink_advantage_2545_scan_software.pdfIn PDF document text
    • http://sowoxapexemex.sportsontheweb.net/dozur.pdfIn PDF document text
    • http://xitabijasava.getenjoyment.net/25523602837.pdfIn PDF document text
    • http://pitoxur.iblogger.org/28224436226.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f3c4034a-4a94-4c47-b6c5-0445626d7bf8.filesusr.com/ugd/655f09_95ae6ff277134a65bf0de69768293d21.pdf?index=trueIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_1546689f38104069b286cae16d52fb95.pdf?index=trueIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_6410c80365c74b6b90e1328d288c4edf.pdf?index=trueIn PDF document text
    • https://16012499-1299-48b0-8cdd-5f23a7749958.filesusr.com/ugd/fafc38_1d045758a97a45e4bb05ec427143b147.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/best_coding_guidelines_c.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/the_official_air_brake_handbook_ontario.pdfIn PDF document text
    • http://nowimirozox.atwebpages.com/fiwozoxopi.pdfIn PDF document text
    • https://6db1e9a2-4282-4636-8d41-de07325ad911.filesusr.com/ugd/d97b38_3ee7087305434994b281a58760bfc904.pdf?index=trueIn PDF document text
    • http://xewarokulix.rf.gd/burukunurowes.pdfIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_0751fee8b2d941c7a45f0010f07efa89.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/list_of_formal_assessments_for_special_education.pdfIn PDF document text
    • https://492f55f4-3442-4b37-b17e-39d9f2f0ae8a.filesusr.com/ugd/7dfe85_0d6f98c58dcb4650ab74f5f7a93c2aeb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pusori/common_pharmacy_sig_codes.pdfIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_c409a4dea3d54c89aca1e531e5fe2c41.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_off0000cd5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5E 4912 bytes
SHA-256: acb07a08d1607968ca5d9050659d0e9653b6fc5ed7300b567e33c03bfdae3eaf
font_01_sfnt_off0000de2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2B 10060 bytes
SHA-256: 8568d93938daad7a8796d77cf401dc993103ecc73c6717e26424b4e8dbe5a781

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