Malicious PDF — malware analysis report

Static analysis result for SHA-256 af11a4923130308b…

MALICIOUS

PDF

78.4 KB Created: 2021-04-01 01:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3541567be9adce7065f604f15dfcb1e7 SHA-1: 71cbfb97a79143a7cfdeb3e0487cee9a69d094de SHA-256: af11a4923130308b4f9a8f6b838f13094ba9cfe649c491071ad699976bc25976
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'dafemum.ru', which is likely part of a phishing or scam campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious site, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dafemum.ru/strik?utm_term=what+is+cyber+security+salary
    • https://cdn-cms.f-static.net/uploads/4366365/normal_6059871dc45f5.pdf
    • http://linorusani.iblogger.org/capites_de_areia_jorge_amado.pdf
    • http://teplotronic.ru/46476806731yxjcj.pdf
    • https://cdn-cms.f-static.net/uploads/4482206/normal_6029228e0b10f.pdf
    • https://cdn-cms.f-static.net/uploads/4443814/normal_6036f8235cc59.pdf
    • https://cdn-cms.f-static.net/uploads/4495536/normal_60167271518ef.pdf
    • http://getporte.xyz/bootstrap_registration_form_with_validation_w3schoolsj9wy0.pdf
    • https://cdn-cms.f-static.net/uploads/4374843/normal_6052f6873bbb2.pdf
    • https://cdn-cms.f-static.net/uploads/4486053/normal_604014b332493.pdf
    • https://static.s123-cdn-static.com/uploads/4406170/normal_5ff94e8057e71.pdf
    • https://cdn-cms.f-static.net/uploads/4468828/normal_601abc3432182.pdf
    • https://static.s123-cdn-static.com/uploads/4382423/normal_5fdd787be6819.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://adc0bc6f-2b4d-4951-bce0-9128d215fa34.filesusr.com/ugd/5ea4d5_7dd885eef66d4a78a0ffc996c7416ae3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/dd96b2eb-1f04-4cb5-842e-0c74665e2ecc/free_advanced_english_conversation_lessons.pdf
    • https://uploads.strikinglycdn.com/files/0a4e0c05-c708-482c-9cfc-16d5a5191871/xikimelokotiwum.pdf
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_6b98c1e1ea2143a5b906bc27542a93a1.pdf?index=true
    • http://xelezunulusa.rf.gd/binijosigikitukoni.pdf
    • https://uploads.strikinglycdn.com/files/f654fbbd-cb9e-4d45-a016-5b1c25886a7b/review_qcy_t1_pro.pdf
    • https://b416d2a3-330e-4518-8f5e-c931256b4cd1.filesusr.com/ugd/5168b2_66a053647cbd484d8daacbc34e3024fe.pdf?index=true
    • https://089130c0-62ae-4bf1-a93c-656440fe8451.filesusr.com/ugd/738632_9b528d8e140d40e782b2a5013b2cb110.pdf?index=true
    • http://zezatavaveb.epizy.com/bimodal_unimodal_uniform.pdf
    • https://ddb0fe67-a09a-413d-b59a-c21b1dde3186.filesusr.com/ugd/3f0e57_0d734e08fc8e473799e52a4ae3294d96.pdf?index=true
    • http://vimitafukufes.rf.gd/como_aprender_ingles_en_linea_y_gratis.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_off0000f4b8.bin
0ff92eb47123639791d46aa5a0e3cb33a5811a3d3d678da7f1b4d21a47b0a54f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B8 5144 bytes
font_01_sfnt_off00010644.bin
097b2382247a2254e91d813ff8778498cefe9c3a560ce263afa4e034157b9d76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10644 10696 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.