Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a12d67269f723e…

MALICIOUS

PDF

66.2 KB Created: 2021-02-18 13:47:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 299480077946f87242f428b305f50d8b SHA-1: 614b01b25571302b8324ccc31944604daef0516c SHA-256: 34a12d67269f723e6d3070bc98805cf677f9a5e8f0b0f06c9f4a0c59ddcdc1bf
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external links, including one to 'jacksth.ru', suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and the presence of many external links indicate it is designed to redirect users to malicious sites, likely for further payload delivery or credential harvesting.

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://jacksth.ru/wix?keyword=cap+leadership+chapter+2+test+answers
    • https://fazokovonopa.weebly.com/uploads/1/3/5/3/135329702/4832d.pdf
    • https://kukanoli.weebly.com/uploads/1/3/4/6/134641169/borurekopexi.pdf
    • https://jokanile.weebly.com/uploads/1/3/5/9/135962808/ae056b54d.pdf
    • https://wapexuji.weebly.com/uploads/1/3/5/3/135329723/vagogevu-tasotuvububam.pdf
    • https://jawoxufogor.weebly.com/uploads/1/3/6/0/136022219/lizisebulotenow.pdf
    • https://jujoxiro.weebly.com/uploads/1/3/4/8/134875196/xeporere.pdf
    • https://fuwefepitebu.weebly.com/uploads/1/3/4/7/134709748/zopum.pdf
    • https://vokefepafox.weebly.com/uploads/1/3/4/3/134333292/33cb62a3.pdf
    • https://xedububedopo.weebly.com/uploads/1/3/0/7/130740082/2200827.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fonumelipo.rf.gd/4858798501.pdf
    • https://s3.amazonaws.com/xugigabitulu/tafiwabuwa.pdf
    • http://gofabudif.epizy.com/85054448417.pdf
    • https://s3.amazonaws.com/nilititonawafim/71818166622.pdf
    • https://s3.amazonaws.com/faxaxos/century_gothic_regular_ttf.pdf
    • https://s3.amazonaws.com/navoburarovada/descargar_cydia_android_apk.pdf
    • http://padepivezaw.rf.gd/hp_server_rack_visio_template.pdf
    • https://s3.amazonaws.com/sixolose/substance_abuse_essay.pdf
    • http://vopawolug.epizy.com/marvel_future_fight_jean_grey_guide.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_off0000c8e0.bin
8365e1f250d84f066cede2153694a097c02979b2ace4c4a74b536d854caef354
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E0 5288 bytes
font_01_sfnt_off0000dae1.bin
b78a03ddf1690cdcbac2e5aa4d732fbc35f297142307ce5041215f4b02e948fb
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE1 9628 bytes