Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e6a7b18d5d97da…

MALICIOUS

PDF

70.7 KB Created: 2020-11-10 00:53:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 8df3f356dc77fef66d81441adf73b826 SHA-1: 2c14d16067240356742076b6cb191f186c67c42e SHA-256: a1e6a7b18d5d97da9b23bb1be38bfcbc4ce22dc5b1d05befbe89bcee18b6d9cd
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffking.ru/aws?keyword=side+bangs+long+hairstyles In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421944/normal_5f9f738465ada.pdfIn PDF document text
    • https://sowameneritela.weebly.com/uploads/1/3/0/7/130775755/mufeje.pdfIn PDF document text
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/8790609.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/7517590.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/sugaguxagu/kufakisatirovefibutakavot.pdfIn PDF document text
    • https://s3.amazonaws.com/kizuporowefib/5367318019.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/kijikapez.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/titration_of_strong_acid_and_strong_base_lab_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aea9458-f0b7-4683-9394-543429bc029e/zuxabejiwuj.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/command_prompt_hacks_and_tricks.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_off0000dbc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC7 5432 bytes
SHA-256: 43480d2ae16c36576e292f4034fba1392d86c6e9c6b94f0c652998daf6634358
font_01_sfnt_off0000ee35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE35 9372 bytes
SHA-256: d4ae42475067e59f09ac8cb7da61177480efb9c3194d04d21047cc61a0c77d6e