Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5d963663b78b79d…

MALICIOUS

PDF

77.6 KB Created: 2021-03-15 15:31:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9aa26ed170ca32946ede543449a81aa4 SHA-1: d6c9bed2c945f59255e8ba98e8aec61ffbaea6b4 SHA-256: d5d963663b78b79dc4502b4ab83166253fc39310006415a851fba5f026b9566e
164 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing and potentially a trojan delivery mechanism. It contains numerous external links, including a link farm, and a call-to-action button, suggesting an attempt to trick users into downloading further malicious content or visiting malicious sites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly indicate a malicious intent to distribute or redirect users to harmful resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=newton+movie+download+moviesflix
    • http://copyrighthelpbusiness.net/pamosesubia4rx2.pdf
    • https://static.s123-cdn-static.com/uploads/4376096/normal_5feec41a05cd1.pdf
    • https://static.s123-cdn-static.com/uploads/4422631/normal_5ff4d6c9f3aed.pdf
    • http://nosinoski.shop/93914927924qi3if.pdf
    • http://artyom.guru/cercle_de_la_forme_paris_diderot0cg5o.pdf
    • https://cdn-cms.f-static.net/uploads/4471488/normal_60401b0409459.pdf
    • https://static.s123-cdn-static.com/uploads/4462730/normal_6003684f9ff44.pdf
    • https://pudonaneguk.weebly.com/uploads/1/3/4/7/134767047/6757060.pdf
    • https://cdn-cms.f-static.net/uploads/4393644/normal_601294de1ad74.pdf
    • http://cenderaoriginator.com/zubaxasinivovitib96a0e.pdf
    • https://cdn-cms.f-static.net/uploads/4477863/normal_602b37e10c097.pdf
    • https://kesadoxiluxar.weebly.com/uploads/1/3/5/9/135974677/327097304f6.pdf
    • http://hotsales-com.xyz/sabopabowokmql15.pdf
    • http://my-credit.info/aerial_hoop_lyra_manualxjggh.pdf
    • https://cdn-cms.f-static.net/uploads/4495271/normal_6026c07d14f8e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://aca292c6-a3ee-4c96-b4c9-db15c8eca1b9.filesusr.com/ugd/cd1d52_4d4e7a60f29e42efaaef9238aa615376.pdf?index=true
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_74dbb513b28042c6967bdbc8d391c5ea.pdf?index=true
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_e3df9bd3720b40f48653a000304323a8.pdf?index=true
    • https://73099f28-10d5-4558-98a1-2f8dc61f1a2f.filesusr.com/ugd/f62eaa_4b6b1d4499104224b5749a7b986b0619.pdf?index=true
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_0ea89113672249728cc71ae1b0183754.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e53e.bin
66ac55d90b95e4b2be119ebd6057099f2145f392a006112fd52874537b2cfdee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE53E 4932 bytes
font_01_sfnt_off0000f60c.bin
74178f9f7a987c99d2025e1eb33a2082bba281a5ad31300479e1543f61fa4878		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF60C 10808 bytes
font_02_sfnt_off00011b21.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B21 4324 bytes

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