Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f653f1b46e9e168…

MALICIOUS

PDF

78.1 KB Created: 2021-03-16 00:17:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 098a5363044a63c45346acedd2810d95 SHA-1: e2d0ccadb30eebae22789eb9b6e63ec013e29771 SHA-256: 8f653f1b46e9e168d827dfda3ed4ebd05567e280623d7d709093e02844fab36e
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious and likely part of a phishing campaign, masquerading as a "reformed theology study guide". It contains a large number of external links, forming a link farm, with the primary malicious URL being `https://soxebez.ru/wix?keyword=reformed+theology+study+guide`. The presence of embedded JavaScript, although not fully detailed here, suggests an attempt to execute malicious code or redirect users to further malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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=reformed+theology+study+guide
    • https://cdn-cms.f-static.net/uploads/4417023/normal_602c0569c70b8.pdf
    • https://static.s123-cdn-static.com/uploads/4405662/normal_5ff2c4533c75f.pdf
    • https://cdn-cms.f-static.net/uploads/4386081/normal_603e516492a4e.pdf
    • https://bivesazi.weebly.com/uploads/1/3/4/6/134652180/860330.pdf
    • https://cdn-cms.f-static.net/uploads/4368741/normal_601be0de8c3b0.pdf
    • https://minetoleletumu.weebly.com/uploads/1/3/4/7/134767865/685441.pdf
    • https://static.s123-cdn-static.com/uploads/4383798/normal_60005ef40a34b.pdf
    • https://naruvemekojesez.weebly.com/uploads/1/3/4/6/134685524/movatozimofojes_xadibomi_fuwajasexer_ripifisoxe.pdf
    • https://cdn-cms.f-static.net/uploads/4408174/normal_6009c0d730112.pdf
    • https://static.s123-cdn-static.com/uploads/4371783/normal_5ff53690d37fc.pdf
    • https://cdn-cms.f-static.net/uploads/4453342/normal_60306437ab17b.pdf
    • https://cdn-cms.f-static.net/uploads/4489245/normal_603abb20c6f86.pdf
    • https://cdn-cms.f-static.net/uploads/4481056/normal_604fbffd3d1a2.pdf
    • https://tiruvodeg.weebly.com/uploads/1/3/4/8/134892329/ff567.pdf
    • https://cdn-cms.f-static.net/uploads/4480748/normal_6041f70e64395.pdf
    • https://cdn-cms.f-static.net/uploads/4488103/normal_604cd39f6a1cf.pdf
    • https://static.s123-cdn-static.com/uploads/4459796/normal_5fcbf24fba1bd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zugutixe/cron_job_date_time_format.pdf
    • https://s3.amazonaws.com/wivunonovef/fikubobezijenum.pdf
    • https://s3.amazonaws.com/povodijirig/charged_up_drake.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_off0000f4d2.bin
5479d7c3825d5fc6f06bf73cc9a67e53cc5f41646051db5b480460c9aa11211d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D2 5220 bytes
font_01_sfnt_off0001067d.bin
ed5096ffef9423e693c0670abcf56f239ab77b45b2216203ff6cc398c1a74f79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1067D 10920 bytes

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