Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0cea0d43cb4a97e…

MALICIOUS

PDF

78.7 KB Created: 2021-03-29 11:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e0cc1534a331977313047b3d592d68a SHA-1: 5e09c79ae8714076f8b66602a65dd39fa215dcdc SHA-256: b0cea0d43cb4a97ed78f39fe69942b91440450b20e2690fa34a049e6a7c28664
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that directs the user to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of external URIs suggests an attempt to download or redirect to malicious content.

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://mezovuduw.ru/strik?utm_term=who+is+the+killer+in+the+outsider+book
    • http://gadimikofeboto.iblogger.org/91909713987.pdf
    • https://cdn.sqhk.co/nesadatifu/1jcjiaG/41187405718.pdf
    • https://cdn.sqhk.co/moxoxitij/i3ghhf5/wujoriwilitetetaxuvadaz.pdf
    • https://cdn-cms.f-static.net/uploads/4497638/normal_6021ffe13cbdb.pdf
    • https://cdn.sqhk.co/bigulikexupa/ejhhbf1/viregozivefeseriraxefuw.pdf
    • https://static.s123-cdn-static.com/uploads/4488855/normal_5ff5a4307efa6.pdf
    • https://cdn.sqhk.co/rapigufagi/io4jhhg/shelter_in_place_illinois_end_date.pdf
    • https://cdn-cms.f-static.net/uploads/4470408/normal_604cda313cb0f.pdf
    • https://cdn-cms.f-static.net/uploads/4410441/normal_601957edbd251.pdf
    • https://cdn-cms.f-static.net/uploads/4445326/normal_6030452790699.pdf
    • https://cdn.sqhk.co/fufejapopunu/4xggdif/ridejekatozozak.pdf
    • https://static.s123-cdn-static.com/uploads/4369508/normal_5ffe86c96dea6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tuxalowafokuvo/biomedical_waste_management_amendment_rules_2019.pdf
    • http://familule.epizy.com/200_synonyms_words_list.pdf
    • http://tokilofi.rf.gd/wojuvulejakenixisijar.pdf
    • http://gozosowizopuk.rf.gd/spiral_ham_recipe_oven_bag.pdf
    • https://s3.amazonaws.com/lusabifef/5128647970.pdf
    • https://uploads.strikinglycdn.com/files/5c6a9d78-6387-44b6-bf8b-45b6d1b0ceb9/sekure.pdf
    • https://uploads.strikinglycdn.com/files/e3f29c09-1c84-48bf-8051-d48e722a7413/sagiw.pdf
    • https://uploads.strikinglycdn.com/files/828994ba-6427-4543-9cc6-bdedc3a88390/braun_series_9_9390cc_best_price.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_off0000f95d.bin
480dc3bc31cbb54b522d13cb97a8d2a1801953fcb5edbf6764a8350c77cd2453
pdf-font-stream PDF embedded font (sfnt) at offset 0xF95D 4920 bytes
font_01_sfnt_off00010a1c.bin
f4a50dd78a8b5613346c66f9474d6bd646e1ed6dbabc728bad7cbab646e7fb28
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1C 10228 bytes