Malicious PDF — malware analysis report

Static analysis result for SHA-256 76c3cb7d9d03ba6a…

MALICIOUS

PDF

77.2 KB Created: 2021-03-16 23:27:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a925abffba5bc7823801ebaba9821fec SHA-1: 1ec5c4f889b2af00a005059b12bc45b3cd37b348 SHA-256: 76c3cb7d9d03ba6a4b81248c70d3b67eca6b391acb5e49c48bf7aa031ba055ef
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an embedded URI pointing to a suspicious domain, and the document body, though truncated, suggests a lure related to Android installation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

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://pelibifir.ru/strik?utm_term=how+to+install+android+7+on+nexus+7+2012
    • http://chuvashovfamily.ru/sajur48q2p.pdf
    • https://mekumago.weebly.com/uploads/1/3/5/9/135981587/6577383.pdf
    • https://sirowatogiwu.weebly.com/uploads/1/3/2/8/132814809/ruterigese.pdf
    • http://bighome.space/digestive_system_grade_4_worksheet6qbmf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7a579b3f-ce96-4c66-abdc-991530493d29.filesusr.com/ugd/010c6b_1ace155f122b4fe0a496eba61a074ace.pdf?index=true
    • https://s3.amazonaws.com/mejigavukolu/jasonunivupeke.pdf
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_540a8454e0f84ce3b9575b6ad698fd84.pdf?index=true
    • http://lujonas.rf.gd/28873012257.pdf
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_f613cd210454469f95b2566961a0200c.pdf?index=true
    • https://s3.amazonaws.com/gurupixabogivaz/bucky_dent_uniform_number.pdf
    • https://s3.amazonaws.com/kifutizijebuj/asp.net_mvc_project_ideas.pdf
    • https://8d59741e-369e-44be-b01e-8fbcb09d2d01.filesusr.com/ugd/7cefa9_dc09d16159d5475a8083a329c1e14edb.pdf?index=true
    • https://82656f1f-dd0f-4426-89ca-c5688288f975.filesusr.com/ugd/56de54_2893a885b1164b5a85703646a63e522d.pdf?index=true
    • https://s3.amazonaws.com/mejados/mikinanipidud.pdf
    • http://durutok.rf.gd/57625231374.pdf
    • https://uploads.strikinglycdn.com/files/219be28d-bfbc-4b5d-a90e-d0a15dd54e86/what_does_te_amo_mean_in_korean.pdf
    • https://s3.amazonaws.com/sinamozagemoger/cartes_du_ciel_linux.pdf
    • https://uploads.strikinglycdn.com/files/d101da03-5ab3-4ff5-a065-128e87f60cf0/gopro_hero3_black_edition_manual.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_off0000f017.bin
e70736120601923faac74f6b2d091fb148bd5d4923e642b3ec3418e9d1ca9398
pdf-font-stream PDF embedded font (sfnt) at offset 0xF017 5344 bytes
font_01_sfnt_off0001026e.bin
f218bf9dfed31564301eb6bf3e986e15b58124e520fc352def002d3b69732988
pdf-font-stream PDF embedded font (sfnt) at offset 0x1026E 10820 bytes