Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b9f1b7f42c63f9…

MALICIOUS

PDF

46.8 KB Created: 2020-11-04 06:54:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2fed625570cc0a661278dceb1a5f5503 SHA-1: 679183966f87337c56b6221e9432cb562609320c SHA-256: 47b9f1b7f42c63f90a08d6efbd370a58f9bcdca38c051b86380427b33ca54b44
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/aws?keyword=escambia+county+arrest+records+free In PDF document text
    • https://purolejomi.weebly.com/uploads/1/3/0/7/130776639/8084845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f9c974fb5a9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f8723342c7fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381532/normal_5f94f212a66cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369912/normal_5f9f148226411.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426957/normal_5f98030f80cdb.pdfIn PDF document text
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/kobosume.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372073/normal_5f8987e861683.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/7922075.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368224/normal_5f8bed9d15e61.pdfIn PDF document text
    • https://gizojobov.weebly.com/uploads/1/3/4/4/134436228/69f2c8fbff97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383687/normal_5f93738160534.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/gobiv.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/cf8cef33-f37b-4eac-8830-e4b90e60b071/blockchain_wallet_app.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_off000076d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76D0 5332 bytes
SHA-256: bb3bb420305b93e10d952110933a00b6d317c47081ab42235f6544cbc2f4942f
font_01_sfnt_off000088e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88E8 10908 bytes
SHA-256: 2f3a0e7126a55deaff1de4da25c0eaa3ab89d8ab2d9545933a76c0fe730e9aa2