Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a8bdb8d59d8e4b1…

MALICIOUS

PDF

71.0 KB Created: 2021-02-09 10:42:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f2c6d373165e6bf7a0fe28a61ec82dbe SHA-1: 65d108ee4140e512cb7db2c0ca51318146a2aa65 SHA-256: 2a8bdb8d59d8e4b1da209efa32ab347e052ce0d9fadedb100d747817d48b8d04
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/wb?keyword=minority%20report%20game In PDF document text
    • https://pakowojazawari.weebly.com/uploads/1/3/0/7/130775116/gejipawika-fanumasofij-niruvu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468563/normal_6002c8174e3b3.pdfIn PDF document text
    • https://solupebasil.weebly.com/uploads/1/3/5/9/135972399/winun.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzalolotagi/Aqgggii/47300712502.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/do6QZ6Z/friday_the_13th_killer_name.pdfIn PDF document text
    • https://cdn.sqhk.co/giwibilawa/jgibQPi/mebemozumipazibegom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377697/normal_5fd964b377074.pdfIn PDF document text
    • https://ranitezal.weebly.com/uploads/1/3/1/4/131438109/c4ac0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411252/normal_5fe00df8f34af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386363/normal_601f3a07d66ed.pdfIn PDF document text
    • https://jevebuna.weebly.com/uploads/1/3/4/5/134594548/fc11c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/fedixuxepurama.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/draw_sheet_metal_solidworks.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/transformational_analogy_in_artificial_intelligence.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/bajrang_dal_song_ringtone_free.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_off0000daa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA9 5036 bytes
SHA-256: 44422fe1527ca239ea0b2989de6f6e319611a10cd8a3dcef68660e9489fb05bb
font_01_sfnt_off0000ebd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD3 10500 bytes
SHA-256: d41120dde13938f20708292bf812bdafc0ecfe078efb6dd456cb5bd90d75294e

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