Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cabdb14819d671e…

MALICIOUS

PDF

72.7 KB Created: 2021-02-27 09:23:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f3982b4ef66a94cc86bd748ad0e7bb85 SHA-1: b8afab595710c240f8828e6b6e595880e355fb29 SHA-256: 6cabdb14819d671e8e1853aca9c48ba16bdb9a01c5a42ed09038b76adcf4cdeb
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious or SEO-farmed content, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the presence of numerous external URLs suggests an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://xajibur.ru/123?utm_term=can+you+get+flat+stomach+in+a+week PDF link annotation
    • http://xonesasa.iblogger.org/82469443578.pdfIn PDF document text
    • https://jiresuzava.weebly.com/uploads/1/3/4/7/134706808/5927380.pdfIn PDF document text
    • https://wedutigumufezeb.weebly.com/uploads/1/3/4/6/134659425/lavutofemugasu-reditidop.pdfIn PDF document text
    • https://vovasodakujex.weebly.com/uploads/1/3/0/8/130874601/d2da3063b9e6.pdfIn PDF document text
    • https://rifivubego.weebly.com/uploads/1/3/1/4/131407021/b062621c8.pdfIn PDF document text
    • https://fizubuvi.weebly.com/uploads/1/3/5/3/135301632/lagenarititolitezus.pdfIn PDF document text
    • http://tepuragebu.iblogger.org/free_printable_analog_clock_template.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/lunojol/youcam_makeup_selfie_camera_apk.pdfIn PDF document text
    • http://gerekuvuburase.epizy.com/kikomolalojemaralavexi.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/catholic_answers_deuterocanonical_books.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/67836336787.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/tuwaxefokuder.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_off0000e00e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00E 5364 bytes
SHA-256: c391b250535bf6dd64a431576ace0ced9730b73cea2153b3d164370e7f37a88b
font_01_sfnt_off0000f24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24C 10496 bytes
SHA-256: d504a2bf4188c29bd32bfcb798ae6f706cfd45ac94051b21a8bfd7519dab50db

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