Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d5e451cf1d08ce…

MALICIOUS

PDF

74.7 KB Created: 2021-05-04 05:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a79756593b6057563315e524fc118822 SHA-1: 2002cb499b6939757924194c978f86b5635f670a SHA-256: 09d5e451cf1d08ce5e1d0d0772fa237de8cda9c243ff46f8a46cbd1d18238927
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://gimoguvi.ru/strik?utm_term=how+to+fix+alignment+on+hp+envy+printer PDF link annotation
    • http://copyrightproblem.com/56481158290z2zsw.pdfIn PDF document text
    • http://kukushpa.fun/add_canvas_to_imageview_androiddp5x4.pdfIn PDF document text
    • https://puwowuxavuz.weebly.com/uploads/1/3/2/6/132682233/wikub-fozabo-labaxedumo.pdfIn PDF document text
    • http://myirn.icu/bemesaviwaj6rd7g.pdfIn PDF document text
    • http://peuer.xyz/best_lightweight_upright_vacuum_cleaner_2019ysq8q.pdfIn PDF document text
    • http://itsnat.space/21325171749y3m0r.pdfIn PDF document text
    • http://nnorm-id.com/europa_bold_font_ttf_freexry2p.pdfIn PDF document text
    • http://sidazolomaw.22web.org/fokemagazozex.pdfIn PDF document text
    • https://boripate.weebly.com/uploads/1/3/4/5/134590871/8871168.pdfIn PDF document text
    • http://idealslimitalia-ufficiale.site/how_many_human_trafficking_victims_worldwideff23d.pdfIn PDF document text
    • http://avto-document.site/638024728958jwbh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_091a5f64f3bf458aa4e62572b142b322.pdf?index=trueIn PDF document text
    • https://0bef8565-087b-457a-960c-b0529baba50c.filesusr.com/ugd/638000_4314a248c2904b04a59356cf04348390.pdf?index=trueIn PDF document text
    • https://bb491b24-4c81-4ccc-8daa-bf1baeb171c2.filesusr.com/ugd/93c935_93dc7ab135824bf0b6fa2ed687085ea1.pdf?index=trueIn PDF document text
    • http://tibobabinenan.epizy.com/tiputiraxifetejeta.pdfIn PDF document text
    • https://6db1e9a2-4282-4636-8d41-de07325ad911.filesusr.com/ugd/d97b38_b6db0cf0909b40bb9187d320ce7e2703.pdf?index=trueIn PDF document text
    • https://4f640d82-8365-4c22-93d6-dbd3427c3fb0.filesusr.com/ugd/55e8b7_022b5dc2307041519a38033322e43980.pdf?index=trueIn PDF document text
    • https://f803bf1b-e1c2-47f6-a41f-c9785c88fbd4.filesusr.com/ugd/bf07b1_9fd6d156e9f644a197dcfc02eabdd098.pdf?index=trueIn PDF document text
    • http://rujipezoj.epizy.com/tanubemadukebakuk.pdfIn PDF document text
    • https://18bc7be3-897e-46c1-a475-efc190d089bd.filesusr.com/ugd/62845f_91ae266917524b0fbeeeccef943b4599.pdf?index=trueIn PDF document text
    • https://7133fc40-0b9c-4701-b953-e7fafc934b44.filesusr.com/ugd/70a38d_1906557e172845f1a5a4b4c1d4373cb0.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_off0000e5cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CF 5420 bytes
SHA-256: 3a165946ae93bc3c901e76fbb7caa9afdd209ff488dff1a776f76835c3a1485b
font_01_sfnt_off0000f83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83B 10904 bytes
SHA-256: be53abc9c41b055b1ca6ea40e8de54524918da2fd070959a014f40eb4441bcc7

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