Malicious PDF — malware analysis report

Static analysis result for SHA-256 675bdaed03d85560…

MALICIOUS

PDF

67.0 KB Created: 2021-02-14 12:44:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75cbebdf1352dd6c7330c26d209fc47b SHA-1: bfe8924244c39ef49c49e90e77194d796e61deb9 SHA-256: 675bdaed03d85560da3ff9ded62f1a18c29a367ccf9412d777eb633217d9acdf
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it is designed to redirect users to malicious websites, likely for phishing or malware distribution.

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://maypoin.ru/wix?keyword=hudson+county+clerk+register+of+deeds
    • https://nenovalo.weebly.com/uploads/1/3/2/7/132712003/firojatesoj_wejolade_jogadasilam_vavevinukagoz.pdf
    • https://static.s123-cdn-static.com/uploads/4374368/normal_5fc95e9ce0ccc.pdf
    • https://static.s123-cdn-static.com/uploads/4408188/normal_5fceb8c8c634d.pdf
    • https://static.s123-cdn-static.com/uploads/4500665/normal_5ffc6a90133c5.pdf
    • https://cdn-cms.f-static.net/uploads/4386613/normal_60206e6169939.pdf
    • https://bokosemebejira.weebly.com/uploads/1/3/0/8/130813317/bec40f298932ce1.pdf
    • https://static.s123-cdn-static.com/uploads/4451945/normal_60038b8f05248.pdf
    • https://static.s123-cdn-static.com/uploads/4486983/normal_5fcaa21904fce.pdf
    • https://static.s123-cdn-static.com/uploads/4459324/normal_5ffc2d9ef2671.pdf
    • https://nogulakotu.weebly.com/uploads/1/3/0/9/130969216/vofujike-zigumoxesitedi-dunuvexipez.pdf
    • https://limotesatax.weebly.com/uploads/1/3/1/8/131871768/9513176.pdf
    • https://xadidevoki.weebly.com/uploads/1/3/0/8/130873902/9961566.pdf
    • http://dovogonusiru.iblogger.org/office_365_filehippo.pdf
    • https://koxepaje.weebly.com/uploads/1/3/5/3/135350813/7675873.pdf
    • https://static.s123-cdn-static.com/uploads/4450641/normal_5fe14c0700cd7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lijukogibedatu.epizy.com/xulemave.pdf
    • http://xegiseko.epizy.com/kazukumu.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_off0000c8e2.bin
bffa2efa5b4953bef66b4036d03591b7f2f33c872cf244538f908e1f565f1b60
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E2 5104 bytes
font_01_sfnt_off0000da5e.bin
a5d9f8230dc8e8b58f80c8b3e1bb9fed27fa59dcae3a65f371348f4163754e07
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5E 10708 bytes