Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c72e2de3d33044c…

MALICIOUS

PDF

82.6 KB Created: 2021-04-28 07:14:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d1ba0ebaee447160d4c511b7c178fa11 SHA-1: 66efae78c8b388b6b96102359b9df8fc9eff4e01 SHA-256: 3c72e2de3d33044c106ff237be206ce517a81bf7ca104b375758ec4e6f0964e5
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though partially corrupted, contains a URL that appears to be a lure for pharmacology-related content, likely a pretext for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/strik?utm_term=pharmacology+made+easy+4.0+pain+and+inflammation PDF link annotation
    • http://1xbet-registr.site/12767340674dwqoo.pdfIn PDF document text
    • http://nnorm-id.com/28186640198f1a1t.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/jFogjjf/33606040003.pdfIn PDF document text
    • http://8gusevshop.website/luvegitotemobarumupotireskskv.pdfIn PDF document text
    • http://dugules.iblogger.org/jung_arquetipos_e_inconsciente_colectivo.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/jaMia0w/52891994818.pdfIn PDF document text
    • http://dapajurop.mygamesonline.org/27543345282.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rovizomaguwex.atwebpages.com/3550074479.pdfIn PDF document text
    • https://de7eff9d-5c50-4122-bb99-ee112abf7a8f.filesusr.com/ugd/db8f21_0c805082c5fa4dc0bfdfb74243285fa6.pdf?index=trueIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_8c0aac76f907420b82f12b2b0d07051b.pdf?index=trueIn PDF document text
    • http://gidegefere.rf.gd/muwotimo.pdfIn PDF document text
    • http://tuminexozuvino.atwebpages.com/missing_411_the_hunted_cluster_map.pdfIn PDF document text
    • http://guruzukatukeged.epizy.com/ayatul_kursi_in_bangla_pronunciation.pdfIn PDF document text
    • https://bac325b5-3710-4a60-ba01-c1ac5e8a7650.filesusr.com/ugd/c111de_d03d4f39192e45cba2a6d5165955a587.pdf?index=trueIn PDF document text
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_8b416a2394e249c8b25e78be9a16783a.pdf?index=trueIn PDF document text
    • http://laraxeramamat.rf.gd/dodolezopalagalefalo.pdfIn PDF document text
    • http://xikavab.epizy.com/jogevafexujebew.pdfIn PDF document text
    • https://dc010c70-835d-4b56-8cb0-1e1bda7cab64.filesusr.com/ugd/fb576b_3a9fc53a553841a2ba0d567a7f80d469.pdf?index=trueIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_5cb9773bdfc34c28ae936894b2f69c56.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_off000102ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CA 5932 bytes
SHA-256: a1c03b08a6fe6bfebf5a05c3eac5303e86bd50e373277a79ec9cb68ccdb87389
font_01_sfnt_off000116e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E8 10796 bytes
SHA-256: e401d9c6f2cbf782f3b38337726c5bb899db8ff84e06e3afc730e9fed183524c

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