Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a1edc68f3e2f15…

MALICIOUS

PDF

111.4 KB Created: 2021-03-15 23:18:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f7615f9be4318d837355db681c33202 SHA-1: 56e0bf108c4b892f999caa39a16743526accb118 SHA-256: 49a1edc68f3e2f1551a110199d7934bf0bde075c75a71e01b49db73d29fc9413
196 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of an advance-fee scam, including language related to lotteries, prizes, and parcel delivery. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=marilyn+t+fordney+insurance+handbook+answers
    • https://cdn-cms.f-static.net/uploads/4420438/normal_5fda31e0e886b.pdf
    • http://zabizuf.22web.org/wsjt-x_time_synchronization.pdf
    • http://milanomoda-italy.website/xikubiluxepalpkhv7.pdf
    • https://cdn-cms.f-static.net/uploads/4455207/normal_5fd97a2f88580.pdf
    • http://save50it.info/62335721541nzpab.pdf
    • https://static.s123-cdn-static.com/uploads/4409244/normal_5fe548776ddce.pdf
    • https://cdn-cms.f-static.net/uploads/4475737/normal_6039e345c02e0.pdf
    • http://fruct.space/95537538605a14i6.pdf
    • https://cdn-cms.f-static.net/uploads/4373504/normal_604a3563b2655.pdf
    • https://static.s123-cdn-static.com/uploads/4482218/normal_5ffc07e94ce8f.pdf
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5fd38db382f52.pdf
    • https://static.s123-cdn-static.com/uploads/4454303/normal_5ff0ac6ed3380.pdf
    • http://lidagejelotodu.22web.org/parestesia_dental_tratamiento.pdf
    • https://cdn-cms.f-static.net/uploads/4367919/normal_5fdc09b42edba.pdf
    • https://static.s123-cdn-static.com/uploads/4373770/normal_60041c5d671b4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kisitibonadal.rf.gd/xelekalulavevugugabow.pdf
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_44791aaf1dfb4dacbbdaa5b2b13f7bcf.pdf?index=true
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_5a46d031d11c4e9d96f46499e1755da5.pdf?index=true
    • http://teposowadu.rf.gd/56701648916.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001753d.bin
4d64dea2268bf8f1c42e5d86e840efd23e3d01775b892ed0ec3f145bf5dbde8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1753D 5512 bytes
font_01_sfnt_off0001881d.bin
da2ba7c93d0d0a33d5a2ed300040ac6aa1eba8944eefa2a2ee4b4b0866a98a3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1881D 11252 bytes

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