Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a4a7881c98d6da…

MALICIOUS

PDF

102.7 KB Created: 2021-02-10 01:57:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e26112f54180974296ae7a08f53070ca SHA-1: 569723ecc9a283e128f4d0e8ea4dce03c2136aa2 SHA-256: 17a4a7881c98d6da4f1daa65fc198927e5f7dfb0b6399da161891fcb1f858ab3
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/wb?keyword=top%2020%20punjabi%20songs%202018%20audio PDF link annotation
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/pusataforefawob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409000/normal_5fc76322e9a01.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/jagcdib/43680558210.pdfIn PDF document text
    • http://sungo1.space/lajexihluoi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380700/normal_601bdaa06dc00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501965/normal_600190ad02f85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5fda632287f57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486535/normal_5fd1fd85487b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473379/normal_5fecc94231965.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464852/normal_5fed1ef08659d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473616/normal_5fd97b2610b2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417403/normal_601ebbd1c96c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496853/normal_5feb973a8ba55.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/veraxawewib/driver_bluetooth_asus_a43s_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/cefsharp._core._dll_microsoft.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_off00015146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15146 5684 bytes
SHA-256: 56288571782caed89bcd08c11a1c54a70d278e690213589684a99bbd2c04cb19
font_01_sfnt_off000164b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164B0 12576 bytes
SHA-256: 9d73bc500e617b7d1a90922c9b30068fbca5aa04c15d2096a43006fde7fd8b15