Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba85bea6e3058897…

MALICIOUS

PDF

69.8 KB Created: 2021-03-21 06:12:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7aacb090d3dddc064fc1ab7b2b77c21f SHA-1: 7ae7ad25695858bf640dea8a3ac1dbb28e827fd8 SHA-256: ba85bea6e3058897a1e1f1e1818dda4156d3a4fe0eb571c508fd283385340d8d
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external domains, with several flagged as link farms on disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded content, though partially obfuscated, are consistent with attempts to redirect users to malicious sites.

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://maypoin.ru/123?utm_term=chain+breaker+lyrics+pdf PDF link annotation
    • http://tebeririz.scienceontheweb.net/49160000997.pdfIn PDF document text
    • https://cdn.sqhk.co/zidenesek/cjaheaI/3d_shapes_nets.pdfIn PDF document text
    • http://neridipazaf.22web.org/rupewejopazewosevifoza.pdfIn PDF document text
    • http://siondez.ru/aprender_ingles_en_7_dias_gratisprfew.pdfIn PDF document text
    • http://tiwilofojifig.sportsontheweb.net/ropipubemibitad.pdfIn PDF document text
    • https://cdn.sqhk.co/bukevexej/RShchdQ/21063716010.pdfIn PDF document text
    • http://gipogup.sportsontheweb.net/glandula_de_bartolino_inflamada.pdfIn PDF document text
    • http://visionnew.xyz/oscar_wao_chapter_4_summaryglz6h.pdfIn PDF document text
    • https://cdn.sqhk.co/dafisuwikib/eEgjip2/65951840944.pdfIn PDF document text
    • http://antonioit.fun/18270872974w2os1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_927d381f1aa04f0c835c5d7f7813d152.pdf?index=trueIn PDF document text
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_f3e7b3b7445148469ddbec620c6ef178.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/charge_off_still_reporting.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/panasonic_kx-tgd220_handset.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/pijejev.pdfIn PDF document text
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_1b65d8cb5abd4d4abb4a4308db5d6f65.pdf?index=trueIn PDF document text
    • http://kikasipab.epizy.com/a3_isometric_paper_template.pdfIn PDF document text
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_7474362308a7474a8e4b85153fb23a26.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/cardiorespiratory_assessment_form.pdfIn PDF document text
    • https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_775b0b4e85124cbcb9c18384821bbd95.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_off0000d408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD408 5452 bytes
SHA-256: e8ab42c3068f2a4c8a6eb6778cba334232961c0afa62ed084fc60a98d95cbdf8
font_01_sfnt_off0000e687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE687 10588 bytes
SHA-256: a77fd9339525795295bfed672744f923d2155af2554daf3d72683f540ed3fb13

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