Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d3c85c0026ea9c5…

MALICIOUS

PDF

82.8 KB Created: 2021-03-16 02:53:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e396314e4219eede39c293d0f5e135b7 SHA-1: 14aaacdc25c4e69d41d913967e47cc9d68e1b5b4 SHA-256: 1d3c85c0026ea9c55de873a84eb66627bdc049c77089269dae44a176e5c110f7
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating it is likely a phishing or trojan distribution attempt. The document contains numerous embedded links, many pointing to disposable hosting services, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the presence of external URIs and the overall structure strongly suggest an attempt to deliver a malicious payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=minecraft+flash+games+tower+defense PDF link annotation
    • https://lirupije.weebly.com/uploads/1/3/1/6/131606624/vogogavaraj-daboga.pdfIn PDF document text
    • https://faxexivironi.weebly.com/uploads/1/3/4/0/134042341/rowezubafajumen-lawugus-jomikasenozigo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408333/normal_603d2969b76e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500677/normal_5ff4c9ec80710.pdfIn PDF document text
    • https://cdn.sqhk.co/dofofigeniso/Njjhdii/kleptocats_plush_target.pdfIn PDF document text
    • https://cdn.sqhk.co/dabebasavus/KK8ig1o/wolizebolawanusoterakig.pdfIn PDF document text
    • https://cdn.sqhk.co/dixufeja/FhaihUh/58019986547.pdfIn PDF document text
    • https://vumazilizulorap.weebly.com/uploads/1/3/5/3/135300666/4396000.pdfIn PDF document text
    • http://tijevuwotej.22web.org/how_to_fix_le_error_on_lg_top_load_washer.pdfIn PDF document text
    • https://cdn.sqhk.co/rifarako/g70OhbC/67902861202.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5366dd3f-28a3-4342-b8e5-5bed86455aec.filesusr.com/ugd/a92322_09fefec5bed349eba2b4ad92a1b8a9b6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0060fd2-df68-43e7-9921-d0d0698f2fc4/zezemetowiwejeramuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17637cbe-d5fc-47d2-9fe8-1de0765d8f3d/24456737776.pdfIn PDF document text
    • http://jefitanebigovun.rf.gd/metformin_500_mg_uses_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b675fbd-f5d7-4dd5-a82f-acc796005eac/ketiribadotumuxuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ddf61b7-1a4c-4bc2-bc1d-285595a2bee2/18857304888.pdfIn PDF document text
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_fd83930526854e70b2d0011db4784d15.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1181f983-93ca-41a4-b684-77c4e2766477/nationalism_in_india_class_10_latest_edition.pdfIn PDF document text
    • https://68f06c25-eb64-4e0a-94e3-a0e33e610147.filesusr.com/ugd/463ace_73458d52953f45dd8c9362c49a857cae.pdf?index=trueIn PDF document text
    • http://kunibenurupamiv.rf.gd/46487465508.pdfIn PDF document text
    • http://muzowagujojate.rf.gd/manual_testing_interview_questions_and_answers_for_experienced_in_investment_banking_domain.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_off00010676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10676 5532 bytes
SHA-256: 7d4b37c2d24751af12d99c97cb875bbe456e4e85b6e886604d2b7dccada316b3
font_01_sfnt_off00011937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11937 10352 bytes
SHA-256: c9f10bc3b01f8d977752fd83749cea462b6de415fbb92740914057d0e9ede0f6