Malicious PDF — malware analysis report

Static analysis result for SHA-256 902780d9152368f7…

MALICIOUS

PDF

81.2 KB Created: 2021-03-18 07:32:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7ecef7f7d850fe4118724a5a2ed123c6 SHA-1: 6ff4a8237f3f6ccddb8b6eb39c855bf73218245c SHA-256: 902780d9152368f7d83a1edc09ffee66e3e914ab9fbe877fb0d347a75516905a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The 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 or SEO manipulation tactic. The presence of external URIs and the overall structure point towards an attempt to redirect users to potentially harmful content or exploit vulnerabilities.

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/wix?keyword=ridgid+rolling+tool+box+warranty PDF link annotation
    • http://5-euro.info/how_to_connect_a_philips_universal_remote_to_a_tvu8xub.pdfIn PDF document text
    • https://cdn.sqhk.co/romumoxoleno/lmghjdg/bejak.pdfIn PDF document text
    • http://sarupunojupud.sportsontheweb.net/mathematical_formulas_in_excel.pdfIn PDF document text
    • https://supuzuvafexag.weebly.com/uploads/1/3/5/3/135383103/wadotaxevifak.pdfIn PDF document text
    • http://copyrighytsupport.com/muzipopinqhbtd.pdfIn PDF document text
    • https://bemuzulezevateb.weebly.com/uploads/1/3/4/4/134440878/3295695.pdfIn PDF document text
    • https://lodikesilir.weebly.com/uploads/1/3/4/8/134868057/1137046.pdfIn PDF document text
    • http://wegoradubi.sportsontheweb.net/boxobawi.pdfIn PDF document text
    • https://cdn.sqhk.co/xojoreve/heagiGc/50647262241.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/movies_like_jack_reacher_never_go_back.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/31043884429.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/juripufalakuz.pdfIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_01aa0d481dbf44929e68b9286598df32.pdf?index=trueIn PDF document text
    • https://6346cca1-8be9-442e-91e0-e35201572fa6.filesusr.com/ugd/a8c077_fe7ef99dd1594d3a9cd75e0ac42acd09.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/welanisowari/jugux.pdfIn PDF document text
    • https://02314edc-d025-420b-9d62-795437f25c47.filesusr.com/ugd/4f0fc1_9765bd51b468431487e14e40b26db13a.pdf?index=trueIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_befff1d70c82421f81e1cc6d3ea8d347.pdf?index=trueIn PDF document text
    • https://68fdcf0a-b1f0-4758-9edf-48d2be6d990b.filesusr.com/ugd/ac51ce_c460597ddee64082bbeeb89d621f977e.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_off000101bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BB 5224 bytes
SHA-256: b25d7e8c701fbe86fe120785f31171f5625e9f6d90c55d61571d3b2d6ab1ae2c
font_01_sfnt_off000113b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B4 10648 bytes
SHA-256: fd16e87dac0895c955e9dd12d8ef422ba877798faed69c550182813b843384c3

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