Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f12513d4d58a7e1…

MALICIOUS

PDF

41.7 KB Created: 2020-08-06 21:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7e855604078a5821a1f21e62a29d2e5a SHA-1: 21976bed148c009af39c0cf3bf6333a91f55a6a2 SHA-256: 2f12513d4d58a7e10d5f276c0124333fef2fd65c915ea08451b49f18f1318131
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=piano+left+hand+arpeggio+patterns+pdf In PDF document text
    • http://files.oceanpinesmotel.com/uploads/1/3/2/6/132696512/4428875.pdfIn PDF document text
    • http://files.honingtonandsapiston.com/uploads/1/3/1/0/131070786/verexe_rafetusabuvuri_pibokudak.pdfIn PDF document text
    • http://files.adimef.com/uploads/1/3/1/3/131379510/5804215.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/1/0434/6806/2872/files/makalah_peradaban_islam_pada_masa_dinasti_abbasiyah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0282/9734/files/dumidesukekemoro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1829/5195/files/biostatistical_analysis_zar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/lavumulokozoxazuwekefiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/23658479493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1313/4743/files/zesedivex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/60342382343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/33569710638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3811/3955/files/90684639039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7780/3931/files/41182481228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7863/8998/files/tijejurokidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5611/0487/files/86286446900.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_off00005b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8C 5304 bytes
SHA-256: 4a7d2f635e4ed33e921330bd932db5e90cd8a655637d88c427903fefc358461c
font_01_sfnt_off00006d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8C 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000761a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x761A 10412 bytes
SHA-256: 2b238d97ae58d17d3161b25c8391e1d9b3fbc728c8149544f4c778b6c192c7d9

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