Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f06004041899088…

MALICIOUS

PDF

38.3 KB Created: 2020-10-09 05:22:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 774ffa7bc7f78b037ab6f2aa22f0eb1d SHA-1: f0e20c03d89b3589ae99bdb1f3ee062c5a88e2d4 SHA-256: 6f060040418990883950a535056ddf09ae7a2463f826fc1b17cba04a44ce8f91
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=Dr.+martens+oxblood+1461 In PDF document text
    • http://files.theharvardfallenangels.com/uploads/1/3/1/6/131606046/barez_biramigejosil_biruxigofuzeta_gowilobera.pdfIn PDF document text
    • http://files.cromptonfc.org/uploads/1/3/1/3/131384374/ronupekakaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e0b36375-82d6-4cde-b062-e3eb8cfd9104/zajobuxanejazekoxuvetaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d2c9400-ef08-4e43-9fef-14b123322a6a/wukexofigake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/632124ce-7e13-42ae-875d-c9da45ec0e98/44439638140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06e51e64-c2ac-4614-9f35-ca7f1378d7ec/wuwazivesideser.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa50051f-0d18-4a7d-a0bc-704a3d1d6be6/radunovurodifotuxenosuna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3206/3383/files/78406032659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/bbr_190_pit_bike_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3448/4648/files/wisafodinulukotabixer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/calorimetry_worksheet_chemistry_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4578/1658/files/manual_de_gramtica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5303/8749/files/wet_and_wavy_hair_products.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0153/4875/files/2424743524.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AC6 5244 bytes
SHA-256: dad21fef5843276fc72f2357b7b6f45243a9c070746de9f24eb7d763f86573e4
font_01_sfnt_off00005c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C85 10096 bytes
SHA-256: 4f064a3963d05240695013760f41253a8a08ddc5b25842f6683844dd7b689b53
font_02_sfnt_off00007e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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