Malicious PDF — malware analysis report

Static analysis result for SHA-256 4df2afb5cb46ff7a…

MALICIOUS

PDF

49.9 KB Created: 2020-10-06 18:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 9397a921ccba9eb467d7b7fca7627421 SHA-1: 5dafcec40da693cfdc8a5f4eab59c05cc1134a18 SHA-256: 4df2afb5cb46ff7aae02169fa05b69cec37577016b0acf37302208825c4dcddd
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://cctraff.ru/strik?keyword=accounting+tools+for+business+decision+making+answers In PDF document text
    • http://files.cooksvillesaicentre.com/uploads/1/3/1/6/131636980/dejajadal_jemiwixetufovo_bajep_wewef.pdfIn PDF document text
    • http://files.sjrathreekeys.com/uploads/1/3/0/7/130776509/9b77bbdda1a4bbb.pdfIn PDF document text
    • http://tatozibe.stmarthas.ca/uploads/1/3/1/3/131398140/2605487.pdfIn PDF document text
    • http://rovedezeb.northstatemycologicalclub.org/uploads/1/3/1/3/131379856/118116.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/878169fb-c7e8-4a21-a433-822382f0181e/leluxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dadaac0-c582-4ef6-9471-62b169fb00fb/gokurerorijem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bc16024-c589-42de-a72f-0b971af9c58a/77966086782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5692/1256/files/ions_and_subatomic_particles_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/zifizelevelegebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4900/7769/files/movies_hudson_wi_theater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/794b993f-5c0d-4f80-9aa0-e7dd2735d98d/kiserizuxexilelutomusoge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79f816ec-28f8-4a67-ab3d-9e07bcf66b19/tefirus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b51fce3-9425-4da8-9f7d-7bc66e17ef88/vobakufibozofodotebufoni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a06ba466-593a-48c5-9875-715f63c4936c/32921240598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aab9a3e-7643-4889-add9-3747896a8245/wupexik.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7632 5508 bytes
SHA-256: c7cc172f4710585ba37c874713aa3576fea7225da69208f8f10446475bfc7cfe
font_01_sfnt_off000088e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88E0 10428 bytes
SHA-256: 9e4cb3e64765bd4b23764853f744b9f5047e8117adcb16cff829974143e8bdf9
font_02_sfnt_off0000ac81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC81 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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