Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2e79ba82a33850…

MALICIOUS

PDF

70.0 KB Created: 2021-06-13 16:36:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 222a39db61aad4c84010055e821c04a8 SHA-1: e855eb65efafd7bdbb6dcf5b8fc08ec08aacfffa SHA-256: 9e2e79ba82a33850b69b6cdfe2ae5aee7f4d6417b85c240a2457683935c95a51
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://chcial.ru/pbw?utm_term=http+get+java PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482863/normal_5fc78d92df308.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459780/normal_5fcd1b81207d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419640/normal_602e0627f17ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447096/normal_5fffd4c6ce4fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465938/normal_5fde2e597a13f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401538/normal_601462503e4d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386354/normal_603cc03e2148e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450151/normal_6013c2c34a4d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453342/normal_60292b5fb1ab1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427526/normal_5fc693f38450f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450154/normal_60220b2198880.pdfIn PDF document text
    • https://nonuradijo.weebly.com/uploads/1/3/1/4/131406562/9180592.pdfIn PDF document text
    • https://rulotukipaka.weebly.com/uploads/1/3/0/7/130776525/2498493.pdfIn PDF document text
    • https://jelijase.weebly.com/uploads/1/3/4/6/134694082/7618670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368770/normal_6064cc3d5b5d4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lufokomarib.pbworks.com/w/file/fetch/144561123/barcelona_vs_real_madrid_2017_3-0.pdfIn PDF document text
    • http://fogofalo.pbworks.com/w/file/fetch/145021953/nba_2k20_legend_edition_apk.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_off0000d675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD675 4776 bytes
SHA-256: ca3de75c3e3b1e784077b8206bb7d3c61e320a08bdc9494f44cbedaa0d8c6c32
font_01_sfnt_off0000e6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DA 10688 bytes
SHA-256: 10510db554c5ca6aaf6c00c0748a45039df9226343492701cac704c43df65e70

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