Malicious PDF — malware analysis report

Static analysis result for SHA-256 f13f408b416dc74e…

MALICIOUS

PDF

43.0 KB Created: 2020-11-07 05:49:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-10
MD5: 090bd4ad2562803c3dd8b9031b9869f2 SHA-1: 70f9ed1281e70ea34491b1195244ae0fc4c910fb SHA-256: f13f408b416dc74ed64342182afbf50a8b5e2f6d80265b3219d9f88baff779ed
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://traffset.ru/123?keyword=edgenuity+2020+teacher PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416810/normal_5f96507759d1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388162/normal_5f9d71d387d48.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/niravubiletejoseveg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382618/normal_5f99e5bbe68b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374537/normal_5f8f155c124df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447093/normal_5f9ddf863941b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427514/normal_5f9f05d098191.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421056/normal_5f9897cc93c0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373997/normal_5fa059f146268.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368242/normal_5fa5328754a20.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000065df.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000065df.bin)
    • https://s3.amazonaws.com/zaxuledo/42399692060.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/banafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c161e93-4b10-4b90-bed4-fc78bd3e9aa9/10926494764.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/capstone_project_ideas_for_social_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69e191e0-0dbd-4df8-b5de-5beb8fedcbf8/39953245563.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 extracted file (font_00_sfnt_off000065df.bin)

Related samples 6

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_off000065df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65DF 5324 bytes
SHA-256: dc1ec403e40932aa16da97a1b0446df283ee0fba9634b81a8e357bc73e2b3a3a
font_01_sfnt_off00007801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7801 11876 bytes
SHA-256: 734eb761321bab66331da79ec7cf9b0ed13cf67c88a69bc326b693651b13fc3e

Open this report in the interactive analyzer, or submit your own file for analysis.