Malicious PDF — malware analysis report

Static analysis result for SHA-256 75c08383f78147d0…

MALICIOUS

PDF

50.1 KB Created: 2020-10-07 02:59:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7b57ab63ca03bb5e165c034c671a34cb SHA-1: 11a912b138169562a3d0802db53d667fc98c2cf7 SHA-256: 75c08383f78147d0e9e34010ed360c03d2b92ae94ff9778dd698d3120c2bbaac
202 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=fl+studio+20+pirate In PDF document text
    • http://files.middleamericanmafia.com/uploads/1/3/1/3/131398560/lebelojipijalupa.pdfIn PDF document text
    • http://files.4k-karate.com/uploads/1/3/0/7/130775755/mariten_wumur_dajogeni_novosinedofaxum.pdfIn PDF document text
    • http://zosamu.commonmissionwomen.com/uploads/1/3/1/3/131397970/rabavesulan-wureguzeb-rejotusujuma.pdfIn PDF document text
    • http://files.ladivina.net/uploads/1/3/2/3/132303001/002c82c5551ba.pdfIn PDF document text
    • http://files.northwoodsspecialties.com/uploads/1/3/1/4/131409309/fatolutiv.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/1/0436/7355/1001/files/synonyms_for_reading_minds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8452/4949/files/hermit_crab_essay_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3017/6159/files/73911228046.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/310b0221-88ee-434a-8ee2-438bb5f5d60f/jeparu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e47ff1e-ff74-4644-a152-b4e51f325a58/barezoranepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a2a1bfe-63c9-41b8-b403-ffcaee01d0cf/30396952861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d27dce2f-21f6-4ff4-b04c-ccc2cb45bfe3/75121239660.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e38f3a9-63e0-4282-a3c4-3e3376b08cab/nodumazufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64a05c81-f031-4e51-bf5b-7001436bd584/jibematamadifasesuwivixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f145a478-0d29-4827-bea7-fb7c1c385556/40525900793.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5043ddf-d23a-43cc-9d01-c715ec381bfd/59074493463.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_off00008654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8654 5184 bytes
SHA-256: 0cfa1599ec024060b23e5ee083a98a8260437ae089b0187740cd49b37c771651
font_01_sfnt_off00009801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9801 10568 bytes
SHA-256: ce241a40c296881418508bbbf0a4973da1fe7d10562d2431fdee015a2323151e

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