Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d74869f17a8250…

MALICIOUS

PDF

68.5 KB Created: 2020-11-24 14:00:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9c3179b8da5ee04e8ef3097a9b5810cb SHA-1: 1c01333f5218942af5fc527d8299242c94df7e9b SHA-256: e8d74869f17a82501bb1e875c31f4898217bc6649762a00f932446e4f822f944
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or distribution network. The heuristic 'SE_REMOTE_SUPPORT_LURE' indicates the document likely attempts to trick the user into installing remote support software, a common tactic for malware delivery or credential theft.

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://traffnew.ru/aws?utm_term=function+point+estimation+template+xls PDF link annotation
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/8c09e1a.pdfIn PDF document text
    • https://dilabugesoko.weebly.com/uploads/1/3/4/6/134627797/feneretazapib.pdfIn PDF document text
    • https://dofukuligofevo.weebly.com/uploads/1/3/4/8/134869200/8482496.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5fb7487c6a64d.pdfIn PDF document text
    • https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/74e88eb3ff4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413375/normal_5f9b68f826bba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383314/normal_5f90dd29b7489.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/four_marks_of_the_catholic_church_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/unified_remote_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/lajonozezozawadek.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/31551208155.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2E9 3596 bytes
SHA-256: 449b1118f406850fb0e8c0a1187eb7eb657fafcac94755d4631432eeffee6e7a
font_01_sfnt_off0000cfd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD0 5004 bytes
SHA-256: 84a1c30ef22a700c6eb9967ba40f8b690b2187df16a175e04d769e40cf7b54b4
font_02_sfnt_off0000e0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CC 10580 bytes
SHA-256: e495f3b1e376d7c47ac4bf79f00c70f82bf17a093bd5ef1bf68045f2d7f4c917

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