Malicious PDF — malware analysis report

Static analysis result for SHA-256 41fffe7c449a614e…

MALICIOUS

PDF

42.0 KB Created: 2020-10-02 17:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 2878ab9b5b0742294f390a6f8167cf98 SHA-1: eb8d2c06b11b6b61e8e575119d4a36ddc369e2be SHA-256: 41fffe7c449a614e35053145ce6bdfab6056c80ac0310d5a8ec635da52271e77
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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/strik?keyword=business+environment+pdf+for+bba+3rd+sem In PDF document text
    • http://detumi.applebypropertymanagement.com/uploads/1/3/2/7/132740478/87fcd.pdfIn PDF document text
    • http://files.furnaceproject.org/uploads/1/3/1/6/131637108/pumojebove.pdfIn PDF document text
    • http://files.libertydeafchurch.org/uploads/1/3/1/3/131398100/bobovizobeve.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6404/2396/files/mass_effect_3_banshees_are_overpowered.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/25883609407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3709/8133/files/kupokijebam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2725/8270/files/lab_report_example_biology_enzymes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4388/7016/files/download_fly_gps_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5730/1654/files/81356731900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9315/5230/files/texuzufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6765/7371/files/dnd_5e_smoke_bomb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9496235a-c50b-46ad-85d6-c3ee2bc46ece/sotute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71003439-ca8f-4909-9e46-0f3f33873af3/wuwurigeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02270683-fc7e-4521-b0bf-b097973f3b65/2263330319.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 3

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_off000065f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F5 5568 bytes
SHA-256: e2514401c35289524fcedd3bf2595c146f86993ea096e8166652fe6219ac8843
font_01_sfnt_off000078d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D3 10128 bytes
SHA-256: 43eb9eeabbbb1f594d1cdcc0656bd5c1aa2910ff4d922508dc18ea58edcaa32e

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