Malicious PDF — malware analysis report

Static analysis result for SHA-256 126ab309bf579148…

MALICIOUS

PDF

79.2 KB Created: 2021-05-08 14:34:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: c492c9b72bb90a4a9c6add6c91e5c3b7 SHA-1: 58ac406271937ea11bcf42ffb4da162fbc99dd66 SHA-256: 126ab309bf579148e757829d6cdf2c12f9a8762d9d39c3c779948dd1c1d8e665
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or spam distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://vilenefex.ru/strik?utm_term=how+to+connect+cochlear+to+ipad PDF link annotation
    • https://zojobowexiwe.weebly.com/uploads/1/3/1/3/131380894/5789533.pdfIn PDF document text
    • http://onlajn-kassa.ru/matibukonamubilaxovist6j.pdfIn PDF document text
    • https://getenulezawo.weebly.com/uploads/1/3/4/8/134897364/binidizu.pdfIn PDF document text
    • https://gawinesiti.weebly.com/uploads/1/3/5/3/135383431/6584432.pdfIn PDF document text
    • https://xazonulukobimov.weebly.com/uploads/1/3/2/7/132712199/fevije-wojel.pdfIn PDF document text
    • http://matrixbicycles.com/john_deere_d140_oil_weight9zhbw.pdfIn PDF document text
    • https://jijobowuzum.weebly.com/uploads/1/3/4/5/134590228/543117.pdfIn PDF document text
    • http://webmastervlad.ru/vuwaxuxumnbhg.pdfIn PDF document text
    • https://buranujepexu.weebly.com/uploads/1/3/4/3/134339299/a0732525e9b.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/ifFhgyY/terra_mystica_hexen.pdfIn PDF document text
    • https://cdn.sqhk.co/lixabanitav/yjeM3id/street_car_racing_3d.pdfIn PDF document text
    • http://nextauto02.ru/877957548775gt1h.pdfIn PDF document text
    • https://cdn.sqhk.co/duvapegoleva/0OjT7dr/64517768478.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/Cnjdbf2/international_marketing_notes.pdfIn PDF document text
    • https://maxawoxemun.weebly.com/uploads/1/3/4/6/134615094/428124.pdfIn PDF document text
    • https://fozaronu.weebly.com/uploads/1/3/5/3/135349809/fovugofepux.pdfIn PDF document text
    • https://nakigere.weebly.com/uploads/1/3/4/6/134608851/6447664.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/kDIijeS/wegerugukijutonapifaxupab.pdfIn PDF document text
    • https://cdn.sqhk.co/netimawifes/jaKhjgj/lutopavakazilegi.pdfIn PDF document text
    • http://meetlait.pro/10192469777xx2l2.pdfIn PDF document text
    • http://ujjjrrrrr.space/81799945887o3e2l.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/jaXhejj/94285020302.pdfIn PDF document text
    • https://vetubopovitomux.weebly.com/uploads/1/3/5/3/135311090/5513023.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/VhdgerR/novogratz_skylar_coil_modern_sofa_bed_and_couch.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF705 5036 bytes
SHA-256: 3ab2a3fda52120c4f01f5314eff8fbcef9a12761180d572badd2be98bad7f1d0
font_01_sfnt_off0001082f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082F 11604 bytes
SHA-256: 40bbf9de01924ec7639a851d4a515b6370029aa48460bdc4c31be1b418aa4393