Malicious PDF — malware analysis report

Static analysis result for SHA-256 93467305806c39c1…

MALICIOUS

PDF

60.1 KB Created: 2020-11-29 00:37:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a7babae1992c9bfb1040da6eead6e3b8 SHA-1: 337ca0a92dce663833913d8362578c54a71ab358 SHA-256: 93467305806c39c1f141e63e2c432261c7cbe8b9491f407f291219ea06c8bf2f
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ggtraff.ru/aws?utm_term=bobby+east+vanilla+album In PDF document text
    • https://cdn-cms.f-static.net/uploads/4447641/normal_5fa19bc891ea3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407781/normal_5fbd433815977.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418583/normal_5faeee621d348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446784/normal_5fafa11a12db9.pdfIn PDF document text
    • https://wanuwoziburake.weebly.com/uploads/1/3/4/4/134458428/d62b72632293e0d.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/kijelopazekune/48295443676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e64c398-4850-4239-a8a2-450b82f9054f/fotovopijo.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/91645897381.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ab02dcc-cca6-4f28-9ca2-783871dc9c02/sezedifejilebisopigaw.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/picada_de_formiga_em_cachorro.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/hyperlipidemia_guidelines_pediatrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64f48885-0011-46e4-8cd2-a0f1f5791190/72759926340.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1b6a262-0726-4c63-8360-b00e12103318/80294840703.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_off0000ae0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE0E 5084 bytes
SHA-256: db4c120d6948cc42ad5b13af521caece16edf424959de7bfe86b1f8db57098d7
font_01_sfnt_off0000bf59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF59 10612 bytes
SHA-256: 4a99d162fcf4e598203e5eb7c0e943d1d853805d30c2a12d1db2d8dd8051c5af

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