Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f973d01d0485b1…

MALICIOUS

PDF

70.9 KB Created: 2021-02-24 15:34:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbdd1481b6e7b8d64762bbd0cb2c63be SHA-1: ddaa433d2ea29cc074afb547bb25138d6bf65e11 SHA-256: c2f973d01d0485b1e60f8f2d452ee960ac6e9deaeedee5f747ed137d2bdede3f
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it contains an embedded URI and uses an invoice/payment lure. The embedded URL, https://crophysi.ru/award?keyword=best+way+to+check+business+credit+report, is likely the primary objective, aiming to redirect the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and detection names suggest it may leverage embedded JavaScript or exploit techniques to achieve its malicious goal.

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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://crophysi.ru/award?keyword=best+way+to+check+business+credit+report
    • https://static.s123-cdn-static.com/uploads/4484118/normal_5fc7fd1cd06e8.pdf
    • http://paringljkf.com/gajegojatigolodunodojzhva0.pdf
    • https://cdn.sqhk.co/muxigatatini/ggshhgd/evony_the_king_s_return_spiritual_beast.pdf
    • https://cdn.sqhk.co/wexovezojab/kdicS61/16877283066.pdf
    • https://cdn.sqhk.co/wodelaganav/hdMjfhg/zidafeped.pdf
    • https://static.s123-cdn-static.com/uploads/4446147/normal_5fef451a97f0d.pdf
    • https://cdn-cms.f-static.net/uploads/4453142/normal_601166b237ded.pdf
    • https://static.s123-cdn-static.com/uploads/4448345/normal_5fe5ae471091b.pdf
    • https://static.s123-cdn-static.com/uploads/4478952/normal_5ffc8c7dc3140.pdf
    • https://static.s123-cdn-static.com/uploads/4490539/normal_5fe4ce27a614a.pdf
    • https://cdn.sqhk.co/xeloxilava/MUTHiga/download_game_pac_man_fever_ps2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gotitibekovi/sugozokeji.pdf
    • http://jetumodegupejit.rf.gd/2601767160.pdf
    • https://s3.amazonaws.com/zesixefe/guia_de_cetoacidosis_diabetica_ada_2016.pdf
    • http://gafamiziwadi.rf.gd/how_to_use_ipad_pro_for_teaching.pdf
    • http://fajegefifozibe.rf.gd/reading_plus_level_k_answers_the_bet.pdf
    • https://s3.amazonaws.com/xokebore/96032478458.pdf
    • https://s3.amazonaws.com/lakujusitejojet/edmodo_pc_windows_10.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d813.bin
ba1711cd373a050359efc77c9d3c22b02525135b2bdefd8ea6a904d27f1ca310
pdf-font-stream PDF embedded font (sfnt) at offset 0xD813 5576 bytes
font_01_sfnt_off0000eb1b.bin
21edd7226dcc50a7b3601061f875b55d706ea059d6fe9eb74f16527c8e835384
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1B 10400 bytes