Malicious PDF — malware analysis report

Static analysis result for SHA-256 385edd6bd37492fb…

MALICIOUS

PDF

39.8 KB Created: 2020-10-02 11:16:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c18054c9779d0961a44b28d61567c855 SHA-1: d0f31825af1353d9b0f8fa5e567e2296fac7c37e SHA-256: 385edd6bd37492fb2f0e35b854d5cafb9c9ad8346cb3e0e96b2869a5babfd5a3
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://gettraff.ru/strik?keyword=npte+secrets+study+guide+pdf In PDF document text
    • http://kimatutok.heartstonehavenmassage.com/uploads/1/3/1/1/131163723/0a2f03b825.pdfIn PDF document text
    • http://mololof.247racefuels.com/uploads/1/3/1/8/131860553/7247677.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/1/0478/7581/7638/files/vortex_diamondback_hp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7617/7051/files/69568817575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6464/0159/files/pre_tensioning_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53f45ee3-204b-46e7-beb4-9e16e9fa109b/18680799157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb16335c-2f30-487e-96b5-8e3c84205b0a/57473305872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dde9028b-a11c-46fb-909c-b398351c61c5/84427088472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/331f2cb4-6192-4b4b-8f4d-0f99b45dedec/bufisigovipojivakevunoja.pdfIn PDF document text
    • http://files.agrossen.myhostpoint.ch/uploads/1/3/2/6/132681880/fcb82.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1001/5910/files/84172713097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2500/5206/files/garcinia_free_trial.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_off00005dc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC0 5152 bytes
SHA-256: 4c2773bb5878ca19dac640d453dfd1b0b95277e0d96d6ba65d53fb792e9418cc
font_01_sfnt_off00006f71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F71 10316 bytes
SHA-256: 5323a513fd328b2c6a1743de33f596052facf220018a232787406f9685df7418