Malicious PDF — malware analysis report

Static analysis result for SHA-256 86ed041339441b8c…

MALICIOUS

PDF

79.2 KB Created: 2021-05-17 23:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 5e21b75cd975f9c5c351f1b75baf4aa6 SHA-1: 83c3867e0e6fd36973e905253d10b35f5bd4af24 SHA-256: 86ed041339441b8cff761bc079106a3a29b1412488a98c7305a37ce1fa16eaa6
204 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to SEO redirectors designed to host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing and trojan activity. The presence of a download lure further supports the conclusion that this document is designed to trick users into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 7

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dugedepap.ru/strik?utm_term=driverpack+solution+offline+2020+highly+compressed PDF link annotation
    • https://womukowewefe.weebly.com/uploads/1/3/4/8/134889771/maxovalikajituvavom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459464/normal_604b782305aaf.pdfIn PDF document text
    • https://rilavowa.weebly.com/uploads/1/3/2/7/132740415/zivawonitelew-fiwugaf-xusiwekokebe-duxoma.pdfIn PDF document text
    • https://nogisapu.weebly.com/uploads/1/3/1/4/131453993/379461.pdfIn PDF document text
    • https://bopamoverera.weebly.com/uploads/1/3/1/4/131408256/33c7134.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420468/normal_600b6300edbf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470209/normal_605f7b0dd4850.pdfIn PDF document text
    • https://fejiwapofiji.weebly.com/uploads/1/3/4/6/134699364/85f70e6f99367.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464865/normal_601fc3f1c86f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_601500ad919fa.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/jusuberu/32497351448.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/910119360.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/29319660588.pdfIn PDF document text
    • http://sizatopus.rf.gd/29254035993.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/vogigekudilejodi.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/7551071744.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/34102676015.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/91120642613.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/91915401233.pdfIn PDF document text
    • http://pekuvem.epizy.com/post_positivist_approach_to_research.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/97495857145.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/95020162420.pdfIn PDF document text
    • http://pabaxekuvo.rf.gd/95228533877.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/pamexebu.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/52364988747.pdfIn PDF document text
    • http://gateguka.epizy.com/how_to_install_fonts_on_cricut_from_dafont.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_off0000f385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF385 6068 bytes
SHA-256: abfea2187749d002eb15f22a73e7547dabe400edb2d76b9830e34512f2180edd
font_01_sfnt_off0001081a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081A 11392 bytes
SHA-256: 2303856511d706018c3a44fcd781352174a1f0f2e3d6f1c5868d5e2f1b6059ec