Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1c5c72577be7c14…

MALICIOUS

PDF

76.3 KB Created: 2021-03-16 21:09:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 58e1fa77ab5be1438b98e2cfd276b16a SHA-1: 6743a518167d34a6b49c043f726732f36d1c0bab SHA-256: d1c5c72577be7c142e19d8fcecb243219b01215def4983341614fffd0a2ce296
134 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, indicating it is likely a phishing lure. The presence of numerous external URIs, including one pointing to 'ponafet.ru', suggests the document is designed to redirect users to malicious websites. The 'SE_URGENCY_LURE' heuristic further supports the phishing pretext by indicating the document contains urgency-related language.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://ponafet.ru/strik?utm_term=fedloan+contact+fax+number PDF link annotation
    • https://cdn.sqhk.co/wujakegu/hbawDih/steam_gift_card_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/gfgiaBs/modunuzutalakafujifi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458854/normal_60274d08d816a.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/all_cheats_of_gta_san_andreas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445745/normal_6005ceeb99591.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416500/normal_5ffcde9334449.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452839/normal_603ea92414f87.pdfIn PDF document text
    • http://wotukujis.sportsontheweb.net/wulowefabinusixegopixaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421611/normal_604698688b2ec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://totuxivez.onlinewebshop.net/financial_accounting_tools_for_business_decision_making_answer_key.pdfIn PDF document text
    • http://xanedemu.onlinewebshop.net/thromboangiitis_obliterans.pdfIn PDF document text
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_c34c004fd17d452294398848aff80ac1.pdf?index=trueIn PDF document text
    • https://bdc3fad0-85dd-4e34-85f7-620d54d4ff6f.filesusr.com/ugd/10cedf_a8f3bc81ef824239a44e63e21e85e0d9.pdf?index=trueIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_921b3facfabb4db191f4637a886a8405.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ce944ce-d152-46e4-ab08-f41c5d56f2a1/supernatural_john_winchester_journal_pages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/888b50c4-59c2-4951-a33b-e6ef4abf34d6/83894190769.pdfIn PDF document text
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_6c06a9504df947118f0736dbc2f65bcd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f310af4-fccf-4c73-a8ce-acfd1002ea29/john_deere_trs21_parts_diagram.pdfIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_8a2fab5bad6a46b6817520dbb11992b7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7648f9e-dfe1-414f-8176-9eb5182dcbdf/what_is_the_average_salary_for_a_er_doctor.pdfIn PDF document text
    • http://bidajalej.onlinewebshop.net/40596999851.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_off0000ed13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED13 5152 bytes
SHA-256: 3d13d18bde6d94dbd892184b5219213f3396fa5b0b078bc2f0b7bfad6d63dd3e
font_01_sfnt_off0000fe8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8C 10948 bytes
SHA-256: a1275972abd98692bc19d56e8c672ec9211f8fdbf611303f52223091c68e202d