Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad9c3284d6816ce3…

MALICIOUS

PDF

73.2 KB Created: 2021-02-17 01:42:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 00158e2c779b35d6be78b692bb441e4e SHA-1: cf5ed55e9b0dbcfc9b47d309ecf3fe0ab0df9fac SHA-256: ad9c3284d6816ce36e6f16bc54a28a2ce1d06727e36dd341903dc1431241827f
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wb?keyword=what%20is%20the%20meaning%20behind%20stairway%20to%20heaven%20song PDF link annotation
    • https://cdn.sqhk.co/viwiratoposu/wttjhgc/xudijubegisukupulodamibe.pdfIn PDF document text
    • https://cdn.sqhk.co/vaminika/Ef8hajy/clock_calculator_bulb_puzzle_quora.pdfIn PDF document text
    • https://wugepugozufov.weebly.com/uploads/1/3/4/7/134744675/xenimiweg-gobow-xipewaguvudu.pdfIn PDF document text
    • https://cdn.sqhk.co/maweveju/jiRRGgc/creepy_vegas_free_slots_casino_games_online.pdfIn PDF document text
    • https://cdn.sqhk.co/kojariwirip/jb0ehdm/12194983912.pdfIn PDF document text
    • https://cdn.sqhk.co/juxefirapuf/fr61TMy/zexitebezifaminibiligu.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvukidovime/hkEXhgl/koluvebokanuvodalukin.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvuvidova/gRhxOie/96394909034.pdfIn PDF document text
    • https://kunolutupevuj.weebly.com/uploads/1/3/4/7/134772201/4825666.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/dalava/64883021979.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/15185523428.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/revaz.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/agile_and_scrum_methodology.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/29624833809.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/reduce_file_size_mac_online.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_off0000ded2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED2 5612 bytes
SHA-256: 3437f23ceb9b39321885582d226b41f4777c617d51ba5c76f024debfabd1a70f
font_01_sfnt_off0000f1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D7 11176 bytes
SHA-256: d315017ca8566c4c53a605e610fed585bf247922665bc716741db1fd45b0e915