Malicious PDF — malware analysis report

Static analysis result for SHA-256 98ab060067c50984…

MALICIOUS

PDF

67.5 KB Created: 2021-02-26 11:20:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a77975e9a98a0295991895e639ffebb3 SHA-1: 2a763989478b59434b2c10205b11428c5730a108 SHA-256: 98ab060067c509847ab5e919864a82bb64c53a1e202de6112ceec36746bdb05a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to drive traffic to potentially harmful content.

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://leonvi.ru/strik?utm_term=ti+34+ii+calculator+online PDF link annotation
    • https://pulapiselipatux.weebly.com/uploads/1/3/1/3/131378970/rexozu.pdfIn PDF document text
    • http://bupetud.xyz/taurus_g2c_9mm_luger_reviews7clav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412173/normal_60132fa126bcd.pdfIn PDF document text
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/eb3b1d6544.pdfIn PDF document text
    • http://frontglass.xyz/fixenadesrw16r.pdfIn PDF document text
    • https://tugixafebav.weebly.com/uploads/1/3/2/6/132681891/pizewebejabuxije.pdfIn PDF document text
    • https://vofitikasu.weebly.com/uploads/1/3/1/8/131871658/jigesubokunot-likiwaleju-xubuga.pdfIn PDF document text
    • http://opssmall.space/pejulapubwnqu.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/punagilelabon/android_studio_radio_button_onclicklistener.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/31365579299.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/furipim.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/valogajawukarikajevamera.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_off0000caf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF9 4816 bytes
SHA-256: e3b2b3bf10c9a8dc639eda25247e23b703713330c54e62437bdce0a562291c02
font_01_sfnt_off0000db70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB70 11296 bytes
SHA-256: dd1e4afe231963e971f58f17fdb1a4fdb93483d7a51d1b12435b44e28d27889e