Malicious PDF — malware analysis report

Static analysis result for SHA-256 043c32cf2a123c1a…

MALICIOUS

PDF

39.7 KB Created: 2020-08-01 05:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6e7bb591b79e2125c5ed0ac1a1322c8f SHA-1: b75c985d0d925308e88ba9e4bc3ef1ccded1ff8d SHA-256: 043c32cf2a123c1ae1c39e870058edae8df6e89e0f3ee680c5dc3e9527e91f43
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://ttraff.com/pify?keyword=organic+chemistry+david+klein+pdf+download In PDF document text
    • http://files.hlfmgoats.com/uploads/1/3/1/3/131383553/jopaxubesoz.pdfIn PDF document text
    • http://files.centerlislecongregationalchurch.org/uploads/1/3/0/7/130740062/c6a07b957d.pdfIn PDF document text
    • http://files.reid-online.com/uploads/1/3/1/4/131483327/3754961.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://cdn.shopify.com/s/files/1/0434/7179/8424/files/pusijazukoxedij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dosoxuwananeworatimuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1432/3356/files/51624474590.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2225/3205/files/56292905352.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9596/5352/files/99743241206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97253363073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5238/1846/files/napevinamozij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3769/5895/files/webugiliwidufezas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/86526592296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7868/0727/files/galalukorepikupok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8197/3416/files/neopets_food_club.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4581 5700 bytes
SHA-256: f8c14f0be5313aafcf7aa7aa184a92720e1736946ffc300ec58ee3127fb66c62
font_01_sfnt_off000058c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58C6 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00006152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6152 9852 bytes
SHA-256: f3836ce1ba19f03ffe210b1c0ddef3be07dd3173a70c11a8c1d5bc7d21bfb105
font_03_sfnt_off00008315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8315 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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