Malicious PDF — malware analysis report

Static analysis result for SHA-256 64d326920f963c03…

MALICIOUS

PDF

69.5 KB Created: 2021-04-03 08:30:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a80c88f146018c375a3429815fe10858 SHA-1: cf3612d851c534fd81328d02ebbbc9d7f1cdb8d5 SHA-256: 64d326920f963c03ce0f1212982292ad03242ac03a4e215911bba14567a8e259
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URLs are likely used to redirect users to malicious sites.

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://soxebez.ru/wix?keyword=earn+to+die+part+4+unblocked PDF link annotation
    • https://jubekufolofifi.weebly.com/uploads/1/3/4/5/134593927/gitopolobizim.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/aicMKE1/baliguxibuvoporede.pdfIn PDF document text
    • https://monotolifevi.weebly.com/uploads/1/3/4/6/134683372/717557c4.pdfIn PDF document text
    • https://fonekukiko.weebly.com/uploads/1/3/5/3/135393218/sumowekeb_vetizefire_kabig.pdfIn PDF document text
    • https://zizovotitimojuv.weebly.com/uploads/1/3/2/7/132712514/bubusuwovomu_zoxilugas_fisasulebum.pdfIn PDF document text
    • https://visoxifa.weebly.com/uploads/1/3/2/7/132740860/926583fe3c222c.pdfIn PDF document text
    • https://kopojari.weebly.com/uploads/1/3/4/5/134585935/f4a2cf085254.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/kugusivonu-vedukit-wejoginik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404503/normal_6024a0aa2b0d9.pdfIn PDF document text
    • https://cdn.sqhk.co/bikolazasir/evgcggZ/vaxiliz.pdfIn PDF document text
    • https://fufiwixafuwisu.weebly.com/uploads/1/3/4/7/134770326/1634856.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370529/normal_5fd0f6ab24422.pdfIn PDF document text
    • https://xizirasifeda.weebly.com/uploads/1/3/4/3/134344010/gifitubupisaxux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_d3f69309587641eea5c7723fc1eeb3c4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xojafemori/ignou_admit_card_december_2019.pdfIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_fdf1d8eb81f645ad8b9d44e03caf957b.pdf?index=trueIn PDF document text
    • https://d1ced4a1-fa29-4c66-b583-77209f32159a.filesusr.com/ugd/c88d8b_3a2282746edd4f95bb6f3f40983782eb.pdf?index=trueIn PDF document text
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_2afbcb563f114e5bac7bec3c86c35094.pdf?index=trueIn PDF document text
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_ee058fdfc17d45ad8b83411e46854cdd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tibitexil/vexuxuritomolufadawilim.pdfIn 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_off0000d39a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39A 5136 bytes
SHA-256: 9013b94f9d62f33c665de661bb3c8ceefbe503e6284e09248336fb7cb53c8973
font_01_sfnt_off0000e528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE528 10384 bytes
SHA-256: 2665bc93d87526aea9fe559dab0a32b7500d85e91e4bf31dd6a8efa9326ec385