Malicious PDF — malware analysis report

Static analysis result for SHA-256 c125039f3326e08c…

MALICIOUS

PDF

43.5 KB Created: 2020-08-09 01:26:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6d5c092946f397cbd05e1f09dc1b4bcb SHA-1: bea517707fea40fc9985306276a10b0e293622ad SHA-256: c125039f3326e08c15818a0daa4121c91f07f44c374dd80d3c1c3d2a6bbed58a
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://ttraff.cc/pify?keyword=boxing+news+magazine+pdf In PDF document text
    • http://magip.rockybutteslides.com/uploads/1/3/1/4/131407089/1624662.pdfIn PDF document text
    • http://sopugapor.dare2bu.ca/uploads/1/3/1/0/131070374/1342236.pdfIn PDF document text
    • http://files.millantiques.com/uploads/1/3/1/8/131856632/gatedaba_rekudipu.pdfIn PDF document text
    • http://files.davidbarnes-photography.com/uploads/1/3/0/7/130776008/2563450.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/1/0432/8059/7152/files/341756479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/sosanux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/lusapekonisuvuwezuzibediw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/37929748279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5592/2852/files/jotovuwotutifuxir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/44528135528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61086590007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3177/9745/files/nsfas_application_form_2020_nwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/13461611575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4563/3691/files/17698173963.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8222/5566/files/lesirivefalarukujugase.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_off00006b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B75 5492 bytes
SHA-256: 8e60bcab417f9187862af91861f2fc5edc0e1c1ae2016a764a55b60930463308
font_01_sfnt_off00007e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E44 10276 bytes
SHA-256: 8b2e4dc2ad1a6e7ae56a2edbdda01e7fcf0f2177a1ea452d556667c725be55d7

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