Malicious PDF — malware analysis report

Static analysis result for SHA-256 f42e05ddfed63475…

MALICIOUS

PDF

67.4 KB Created: 2020-11-11 01:41:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: c328ef4ccf571733211fd07c321f1dde SHA-1: 37546ea539432b97bbf97559913db4fb3740108b SHA-256: f42e05ddfed634750dc344700bd0b586679b7b3fd08f804034332e1b77213c8b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • 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://trafficel.ru/aws?keyword=vanguard+guided+investing PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389824/normal_5f93991f4a9f7.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/fisapusal_satizedoratuve_gibuwojaforu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426407/normal_5fa276d998a57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374369/normal_5f89b0bd7e934.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/2145604.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371020/normal_5fa6a2542772e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417214/normal_5f9699c2babb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374177/normal_5f9f9f0538f60.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/515c950e-57d8-4b13-ad4d-4d20b5312de0/bhagavad_gita_book_in_gujarati.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/67892675579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/860a2d4b-9a78-40d3-9b15-212ee0b875e3/88524512565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7965ac0f-8b84-41b4-bbe6-5537d3c2f117/velezosimanomiwovitevepe.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/38275638695.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/why_not_both_pic.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/antibody_function.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_off0000cbe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE8 4988 bytes
SHA-256: 006c37248ca91f5fbfd4688a57cdbad0996a51e03d85f76737dc3505776e766c
font_01_sfnt_off0000dcf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF5 10516 bytes
SHA-256: aa89466dc9de4ad5c9dd60b76b8d62a52c34cda4f399c5a12f7997905b66ccc7

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