Malicious PDF — malware analysis report

Static analysis result for SHA-256 52be7914384b2bbb…

MALICIOUS

PDF

77.2 KB Created: 2021-03-15 14:49:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e0b5738c626fc319ce45da8182aabc2b SHA-1: 3ac8e5f498efe65415cd2e2c3e50ef6344632638 SHA-256: 52be7914384b2bbb414b3a2ae981d7cacb2d657f51f198a68d11c85903a31a8d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, flagged as a link farm, and is identified as malicious by ML classifiers and ClamAV. The document body, though heavily obfuscated, suggests a lure related to "cement plant drawings pdf". The presence of embedded URLs and the PDF structure strongly indicate a phishing or scam attempt designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://xezojetit.ru/award?keyword=cement+plant+drawings+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385014/normal_60334f80d1d0e.pdfIn PDF document text
    • http://latuha.com/87081153255ncn95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367643/normal_60091738d10c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461484/normal_5fff013e71cdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487626/normal_600dc23865442.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453142/normal_5fedc23123d66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419413/normal_5ffb5068d54a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505363/normal_604cfc75e8163.pdfIn PDF document text
    • https://voxujoponita.weebly.com/uploads/1/3/1/6/131607404/4843284.pdfIn PDF document text
    • https://doxifivot.weebly.com/uploads/1/3/4/2/134235468/2c3dba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478670/normal_5ff1f054e0d88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408475/normal_600899a02c977.pdfIn PDF document text
    • https://koreluluzoma.weebly.com/uploads/1/3/5/9/135972167/9363840.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469106/normal_5fd1e4d039c45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446491/normal_5fd8e7145e1b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469847/normal_601b187766eee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403127/normal_5ff08d5663dc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420014/normal_602105fd7a1df.pdfIn PDF document text
    • http://item-get.top/2001_maniacs_movie_freenpowk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuwosopawekaz.rf.gd/33538284592.pdfIn PDF document text
    • http://jikoruba.epizy.com/xipanabufajur.pdfIn PDF document text
    • http://povumuvepu.epizy.com/votusadugupomigufa.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_off0000f2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A7 5356 bytes
SHA-256: 4eb8758d35bbf289791d1156d692eab9c7e743f6a4ea7b2d7d6185c2252263bc
font_01_sfnt_off000104d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D7 10244 bytes
SHA-256: e0ba519bbea15e3e7621237bbfbe9ab0fa458b602a372e368addb2063c053f74

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