Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f1399810ace98fb…

MALICIOUS

PDF

72.4 KB Created: 2021-01-23 21:41:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4d00f20c27c78872442af612c43e7794 SHA-1: e8b1766ae7f333c138b9f8404d10c09109d21cda SHA-256: 6f1399810ace98fb916f7b1069b0fbeb640c73f85572fa9dec47adf8d98767d2
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics, suggesting it's designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the nature of the link farm and the presence of external URIs point towards a phishing or malware distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/123?utm_term=lg+optimus+manual PDF link annotation
    • https://midagadin.weebly.com/uploads/1/3/1/3/131381693/b25c9b25e72a.pdfIn PDF document text
    • https://suxekupawuva.weebly.com/uploads/1/3/2/7/132710704/10d7b95486ad.pdfIn PDF document text
    • https://zaxefuki.weebly.com/uploads/1/3/5/2/135299090/f638ee949.pdfIn PDF document text
    • https://xedagiwaki.weebly.com/uploads/1/3/1/8/131856626/2865479.pdfIn PDF document text
    • http://ruzopiter.iblogger.org/the_hitchhiker_s_guide_to_python.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/e9idhjU/wild_blood_apkpure.pdfIn PDF document text
    • https://bowonalixatan.weebly.com/uploads/1/3/5/3/135347428/227f77.pdfIn PDF document text
    • https://pekatube.weebly.com/uploads/1/3/5/3/135393066/83eb6f6f015fa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xupanapil.epizy.com/belkin_n150_wireless_router_setup_cd.pdfIn PDF document text
    • http://fedukiz.epizy.com/26963377111.pdfIn PDF document text
    • http://lugavatakavupo.rf.gd/51892641284.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/mafesevilovowore.pdfIn PDF document text
    • http://lozekav.epizy.com/free_yahoo_messenger_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/3079843941.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_off0000dfbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBF 4984 bytes
SHA-256: 838a1f621b2b02ad85e0b664ce9229534466004f7df4575b4504168a5be55897
font_01_sfnt_off0000f0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AE 10724 bytes
SHA-256: 7afe7480cdd9b5e08a853d6e204f4eacb875d02da0bc447c9bd660ec709cf52c

Open this report in the interactive analyzer, or submit your own file for analysis.