Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d8a03b1f1631569…

MALICIOUS

PDF

69.8 KB Created: 2020-11-10 19:17:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 2bd45f6a1dc84346dd330f6f8086561d SHA-1: 9d69943663c153d9c54a95a7e90d144ff60dba02 SHA-256: 2d8a03b1f1631569e4a87dbf68491b2998a03534a640f29a6ed4b2ec457bcaa0
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffe.ru/aws?keyword=avengers+endgame+123movies+4k PDF link annotation
    • https://goraworozegisu.weebly.com/uploads/1/3/4/3/134324811/fogepirofolagiwoko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403264/normal_5f92a11d09df6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f8742854303f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370540/normal_5f8e55aac1175.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/01c1b3c5bd51c93.pdfIn PDF document text
    • https://nixejovebomir.weebly.com/uploads/1/3/1/3/131380485/jukabaribatiraxaso.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/fogibi/38848290898.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/bufotozokukegogigovati.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/how_to_use_vampire_seduction_in_skyrim.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/nininobemozunaguki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a38f9aa3-be4c-465a-b590-0176c6d3f3a0/pired.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/norme_arinc_429.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_off0000c723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC723 5664 bytes
SHA-256: d71e0c02861aaed05ff4ce9f49e49938e702e9f275043c591a78102b89409f15
font_01_sfnt_off0000da66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA66 2240 bytes
SHA-256: a94fc0b04a3ff4da30cea24b3fb8f2fee2c1ab2008078f8bc2ee051ee710afb4
font_02_sfnt_off0000e47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47E 11008 bytes
SHA-256: 5d3049e27fcf2d5bbb4a0d67151d2e27e5e8d7ade32c192eb753f5e1d7a59256