Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2414363c0ff9ea2…

MALICIOUS

PDF

79.0 KB Created: 2021-01-11 12:05:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 96dc88f9aa5a590ad679b73c97196f40 SHA-1: e650ce13791603fce819838dcfaa9b53702e639a SHA-256: f2414363c0ff9ea24095563e7924d16035d85a9d8037a851514937769f56773c
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by a ClamAV detection and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The primary URL, 'https://trafffi.ru/aws?utm_term=best+software+for+video+editing+android', appears to be part of a SEO manipulation scheme or a lure for users searching for specific software. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of its direct intent beyond link distribution.

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://trafffi.ru/aws?utm_term=best+software+for+video+editing+android PDF link annotation
    • https://xekelubapakam.weebly.com/uploads/1/3/4/4/134499273/rovexojuteva.pdfIn PDF document text
    • https://gozaperirij.weebly.com/uploads/1/3/1/1/131163841/gigusowijudimebamuro.pdfIn PDF document text
    • https://wetolobumusu.weebly.com/uploads/1/3/4/5/134579125/gipodiselizijuxifibi.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/7WhigeI/zoom_cloud_meetings_app_zoom._us.pdfIn PDF document text
    • https://site-1180945.mozfiles.com/files/1180945/streets_of_rage_2_music_download.pdfIn PDF document text
    • https://furiraduwonejos.weebly.com/uploads/1/3/4/8/134870793/nasikisorejepepiwib.pdfIn PDF document text
    • https://sexitikimuzulab.weebly.com/uploads/1/3/5/2/135296232/vevilokibi_pujijidapurora_ranuvaxogaboza_pasida.pdfIn PDF document text
    • https://galesarenad.weebly.com/uploads/1/3/4/3/134380117/98914.pdfIn PDF document text
    • https://kumenesasewoton.weebly.com/uploads/1/3/4/7/134773405/dedakaw_fugukejawufedu.pdfIn PDF document text
    • https://site-1234112.mozfiles.com/files/1234112/v4_engine_motorcycle.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/pozokimepe/nupopa.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/meduvasexoj.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF839 5244 bytes
SHA-256: 1f4eceebbb8230d6a3bb77f4b86bdbc7b54c0ba60d786c1e66c31110c71e88f4
font_01_sfnt_off00010a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A44 10712 bytes
SHA-256: f01c1d829c7703032359fc45ec040997557051c06f9dd3391313ae5d9dbc260d

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