Malicious PDF — malware analysis report

Static analysis result for SHA-256 71496713fc87a328…

MALICIOUS

PDF

139.6 KB Created: 2020-10-30 22:30:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36694cdff68cdf34ad9a173ad67add16 SHA-1: 1228375406da54edb7b1155bb5be6241e09bb11a SHA-256: 71496713fc87a328627fd04d144afcd195a6a9278b1e52687b88a74e6b3f9e50
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains heuristics indicating it is a malicious redirector and part of an advance-fee scam lure, presenting itself as a contract outline. It embeds a URL that leads to a known malicious redirector, likely to deliver a second-stage payload or phish for credentials. The ML classifier strongly flags this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/pify?keyword=contracts+outline+1l
    • https://pinoxelu.weebly.com/uploads/1/3/4/1/134108818/kamabidafup-katofa.pdf
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/a56e79006c3d.pdf
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/945487.pdf
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f8c10f91fa40.pdf
    • https://cdn-cms.f-static.net/uploads/4368952/normal_5f884a87c5ab5.pdf
    • https://seforurusux.weebly.com/uploads/1/3/4/1/134131879/4c0e532.pdf
    • https://gokefezenomi.weebly.com/uploads/1/3/4/0/134040807/birajekikadowaxifisu.pdf
    • https://folukufisika.weebly.com/uploads/1/3/1/3/131384255/6b12bd62d596563.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c4a6cfd2-4803-4247-abe5-fd5ec36feea3/72754010259.pdf
    • https://s3.amazonaws.com/felasorarabipis/important_days_and_themes_2019_in_tamil.pdf
    • https://uploads.strikinglycdn.com/files/bc716515-afa9-478e-98e2-080b986960e9/a_raisin_in_the_sun_anticipation_gui.pdf
    • https://s3.amazonaws.com/wizidimawag/nobleboro_central_school_maine.pdf
    • https://uploads.strikinglycdn.com/files/fb5d731b-a983-4dcb-9f82-070d22d03cbb/tofagakilamotitevusaf.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cca2.bin
006076e551d4bee01de3b653f351d8895929cbceb0346941e5e75967df2c4529		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CCA2 6072 bytes
font_01_sfnt_off0001e186.bin
51fdace8bd53b7d2e6af2c0ab3a57c298b99a0f760d42a36c32010743562cd6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E186 1684 bytes
font_02_sfnt_off0001e9ea.bin
7f81b9af7614e3177a1f5611725354bdbbb2e5978ba6f82234535f0c22841bd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E9EA 4748 bytes
font_03_sfnt_off0001fa15.bin
116893a8803da2f0710b11446b625e76f250c72955f102b8df9e88f3d4ecf057		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA15 11044 bytes

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