Malicious PDF — malware analysis report

Static analysis result for SHA-256 722d9a988b70b558…

MALICIOUS

PDF

78.2 KB Created: 2021-04-02 16:22:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab435e9afe41216754b0287617f983ac SHA-1: 91e237546dc6de4c5fb0409d8d5f7c990417b767 SHA-256: 722d9a988b70b5587610a873f6f39784cdd52ed09e9d04ec71cf2e191792bb16
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to redirect the user to a malicious site. No scripts were extracted, but the presence of the malicious URI strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/wix?keyword=waking+up+pdf
    • https://mozipode.weebly.com/uploads/1/3/1/4/131437967/kolubasisikal.pdf
    • https://koxepaje.weebly.com/uploads/1/3/5/3/135350813/pulenexoluwam.pdf
    • http://dostafood.xyz/is_disney_accepting_reservations_for_2021dn2nm.pdf
    • http://mixed-rootwork.com/ziweguzokudonujezube6acwt.pdf
    • http://tiktokcopyrighthelpteam.com/how_to_write_a_cover_letter_for_a_military_joboh7dt.pdf
    • https://kelebididoxo.weebly.com/uploads/1/3/2/6/132681806/3666950.pdf
    • https://dawutika.weebly.com/uploads/1/3/1/4/131407504/2c80b1bb.pdf
    • https://tajulariti.weebly.com/uploads/1/3/4/8/134863193/voleribategeta-wexijuka.pdf
    • http://bbbbbbbbeeee.space/titadudk9kca.pdf
    • http://mebosopevux.iblogger.org/aiaa_conference_presentation_template.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_eab698adf09e45e0a5f00e7eaea72049.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f33cb8ae-1547-43cf-bb62-8e050ac76e4c/vetofifexubale.pdf
    • http://tinafominur.epizy.com/intrauterine_contraception_guidelines.pdf
    • https://0f285ee0-1b14-49a2-8a3e-060a2db94812.filesusr.com/ugd/4bf67f_688a07c85f654b339f2a7ff878fc1f85.pdf?index=true
    • http://nifuxezelepet.epizy.com/how_to_thread_my_brother_ls2125i_sewing_machine.pdf
    • https://s3.amazonaws.com/gelawiweza/15803189929.pdf
    • https://uploads.strikinglycdn.com/files/6016e6be-ba53-4d15-92e2-553e63210a94/fulebobofidexijul.pdf
    • http://diretoroj.rf.gd/7757571554.pdf
    • https://s3.amazonaws.com/degagaziv/57602076884.pdf
    • https://uploads.strikinglycdn.com/files/c1f5e3e2-bdf1-4b19-b031-b08267a0b3d2/fundamentals_of_physics_9th_edition_solutions.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_off0000f466.bin
f20b4c056dfdf6881dd5a8a1711547fc45146900a0e31c8886453018eab5f83e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF466 4980 bytes
font_01_sfnt_off0001058a.bin
cb87af364740618f3ae8e0264494dbf05b7842c64b531ebab83edbe1f104fcb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1058A 10812 bytes