Malicious PDF — malware analysis report

Static analysis result for SHA-256 01bf1d1fec341e81…

MALICIOUS

PDF

68.0 KB Created: 2021-03-26 07:20:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ee8230d9bb893f2eb3555979d9ab19e SHA-1: 497b568eb771c0aa745e4e816d7098ee4afa2b80 SHA-256: 01bf1d1fec341e81c436c27f658c2a01278da540b6965f3b05986cbc086c70b4
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit the user by directing them to a malicious resource, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/wix?keyword=lark+manor+gertrude+dining+table
    • http://tifomab.22web.org/6047137109.pdf
    • http://viwavidif.getenjoyment.net/issue_of_debentures_journal_entries.pdf
    • http://summerita.fun/siwigodezowefusugozutusuk5aq4.pdf
    • http://tokio-2020.fun/wosomop93f81.pdf
    • https://cdn.sqhk.co/tuzijaxab/0jfZyic/mutedawexusewaxe.pdf
    • http://randname.ru/schwinn_trailblazer_double_bike_trailer_redd434r.pdf
    • https://cdn.sqhk.co/togixulala/PihhSI0/lodaxomopapukawoxegovivew.pdf
    • https://cdn.sqhk.co/zuzipogowita/0fyhbgg/battleship_cove_fall_river_massachusetts.pdf
    • https://cdn.sqhk.co/jigavozef/S5Djggd/bapupupemovitiwejakize.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7f3356c1-ec1f-498a-9d41-5b36c14d87b7.filesusr.com/ugd/98d33d_1ce50c6df5aa4d14aafa451237177248.pdf?index=true
    • https://08b4a39d-fa16-4eaa-91be-ae90003cacb9.filesusr.com/ugd/237bf7_6a15bc539c0e4f0692efa0e2a7ce8c69.pdf?index=true
    • https://34ea5197-a9e9-4ba5-99bb-a7dd7aeba98b.filesusr.com/ugd/234f58_b836de03b5e145e7b4f68ea2abee7617.pdf?index=true
    • http://rivamuboxu.epizy.com/7545554828.pdf
    • https://f64a1a0a-debf-4843-a838-a34c0cae0f4a.filesusr.com/ugd/89602e_52a69e49cab44db7bcb1d0aa28e0c275.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1700458e-3991-49ef-bea4-3e85bab1878b/49029992211.pdf
    • https://uploads.strikinglycdn.com/files/eb6aaf7d-8186-463a-b2d0-dac99ded1b78/what_is_a_critical_hit_in_dd.pdf
    • https://uploads.strikinglycdn.com/files/d9b30603-53a7-4d6a-9677-ae0e52cb0631/41662599568.pdf
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_f3809c6e2df34f5586e99ec710015443.pdf?index=true
    • http://tuwutexo.onlinewebshop.net/wegiko.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_off0000cb7f.bin
fbc6b8d32a8b76081efc9e89cf97661c8c43709c4d4383f9e0d72d4802cb1e03
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7F 5112 bytes
font_01_sfnt_off0000dcd4.bin
43cd71e389adced004367ca9b14c22f54f53372db61edf3b2df819366078c258
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD4 11060 bytes