Malicious PDF — malware analysis report

Static analysis result for SHA-256 af3b14f353015538…

MALICIOUS

PDF

64.9 KB Created: 2021-01-28 19:23:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b404286e622a3e5f68c010f77793c68c SHA-1: f92cba801c487b151a562e0b432753b123cd9128 SHA-256: af3b14f35301553884d4080bb9c41b5f58c47cbfc7d781856c4903f604914937
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/123?utm_term=roland+rd+700sx+harga In PDF document text
    • https://static.s123-cdn-static.com/uploads/4475217/normal_5ff689ca5303a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474191/normal_5ffb907bd1664.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486745/normal_5fd7c2d886aab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488330/normal_5fd90b780f37f.pdfIn PDF document text
    • https://cdn.sqhk.co/kezixowog/ibmhegc/run_ninja_run_3_game_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446170/normal_5fc86b449abf0.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/8yW3Tgg/old_point_national_bank_main_office.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459060/normal_5fe7082f42ec8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450501/normal_5fde580a6694f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476939/normal_5fe087c478ea2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496571/normal_5fe4a2c1754c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449630/normal_5feb154f592a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478946/normal_5ff929a2afb6a.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/dikobepibelun/tiloletetus.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/anime_good_job.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/beauty_plus_camera_software.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/lotaforo.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/82341577438.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_off0000c0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0BC 5384 bytes
SHA-256: b3d1b9741b957e4fa01d6ae7add7db76864e60ec7f7fe145e0ef21ee09428d1e
font_01_sfnt_off0000d312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD312 10960 bytes
SHA-256: 23ec4289f45611d3f9249043f748688e0ef2f4814e29ffab04b91a8335295a87

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