Malicious PDF — malware analysis report

Static analysis result for SHA-256 392d31a03ba2eb1a…

MALICIOUS

PDF

69.5 KB Created: 2021-02-01 08:01:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d50465111707aa2da5eb51c7bf606e9d SHA-1: 54f37a18a0bcc3a3fbe3849bb854c6582246d7e0 SHA-256: 392d31a03ba2eb1ad22196e38a739435d214d55998db46cd819de5d41de2d0b4
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/aws?utm_term=felt+bicycle+size+guide PDF link annotation
    • https://cdn.sqhk.co/dapubebireba/br3jgUb/cruise_com_dania_beach_florida_hotels.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/64swiHP/feworareluwiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384325/normal_5fe9e03b6f58d.pdfIn PDF document text
    • https://cdn.sqhk.co/xoberuweri/gh2khhb/osu_help_desk_phone_number.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444370/normal_5ff453d31b070.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/ejjYhwF/chess_endgame_training_bernd_rosen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489237/normal_60129507be294.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446762/normal_5ff8457876d7e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403818/normal_60044c39eb236.pdfIn PDF document text
    • https://cdn.sqhk.co/rovifatira/fifZijD/battlefield_4_commander_pc_download_free.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/bYgpCaL/machine_builders_usa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387240/normal_5fe31c3b28cb3.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/tawosutosuxi/audible_alternatives_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/55809731467.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/heliospheric_current_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/74283881795.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/74067854758.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/69285372692.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_off0000d3b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B3 5048 bytes
SHA-256: 889af25cc2b4b8389308a1a31f1bed68c1733e198b55b562bdd1dd2a0003b2f6
font_01_sfnt_off0000e508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE508 10528 bytes
SHA-256: 7d328a9dc9debbfa6b8e3875b1f6d6202e2a1da8e8f4f36a32bea161bf5b68db