Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7a6da25b5a39982…

MALICIOUS

PDF

65.0 KB Created: 2021-02-18 23:41:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4bb3086b955ee69cb7d3b5e1a45f559e SHA-1: 6cc9f969cd7dea1d134d0da626b45ed23ae5f990 SHA-256: f7a6da25b5a3998284a87e3c6e2d92ba23a310aa3f29806a98c3eba10aec246d
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains and link farms, characteristic of phishing or malware distribution schemes. The presence of external URIs and the 'link farm' heuristic strongly suggest the document's purpose is to redirect users to potentially harmful content.

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://baarspo.ru/wix?keyword=ap+human+geography+chapter+12+key+issue+2 PDF link annotation
    • http://cozyplacefor.rest/40759908041rq379.pdfIn PDF document text
    • https://manesufepal.weebly.com/uploads/1/3/1/3/131381078/kawozuf.pdfIn PDF document text
    • http://jopkapopka.online/wize_enterprises_patiala_contact_numberoj3pe.pdfIn PDF document text
    • https://cdn.sqhk.co/kupuruvew/gejggce/free_online_video_editor_with_music_and_pictures.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/K1LjgKD/91011849295.pdfIn PDF document text
    • https://nituxokijawagez.weebly.com/uploads/1/3/0/9/130969825/2447904.pdfIn PDF document text
    • https://cdn.sqhk.co/migazajigum/ljdiiCv/evacuation_zones_california.pdfIn PDF document text
    • http://redirunna.xyz/29182101887ychra.pdfIn PDF document text
    • https://jekodijup.weebly.com/uploads/1/3/4/4/134490718/mutadop.pdfIn PDF document text
    • https://gidisapawifo.weebly.com/uploads/1/3/4/6/134611794/709019.pdfIn PDF document text
    • http://djami.ru/selodazuvomulisupajiq0drr.pdfIn PDF document text
    • http://torchqbfl.fun/elder_sign_omens_apk_portuguescp6go.pdfIn PDF document text
    • http://curvepreloved.com/macrumors_buying_guide_apple_watchcvtct.pdfIn PDF document text
    • http://testertumentum.space/tridef_smartcam_crackziuqp.pdfIn PDF document text
    • https://pabebubi.weebly.com/uploads/1/3/2/6/132695301/kuropudepopixu-lititusugimul-boxedofojuke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://petafifagaj.rf.gd/is_pedometer_on_iphone_accurate.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_off0000be99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE99 5656 bytes
SHA-256: 5d57e67049936545d2683635c6221a03421dfda02e3330b149f29aca25392907
font_01_sfnt_off0000d1c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C2 10316 bytes
SHA-256: 593045d12907645d91473c4988ed5fc64da966b439f5764b8c0be4069d16303f

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