Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6b5889c26db29ff…

MALICIOUS

PDF

134.9 KB Created: 2021-04-24 13:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1a6f1ea4880a5a7afc1280cb8166f4f7 SHA-1: 537b34863989d9d5735d345df14ff1f319ab3be7 SHA-256: b6b5889c26db29ff1cd2f5d4a91a6b9aa0e974dfd1c24425b7e958b75fc9fbf4
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to be a lure related to "Reznor unit heater manuals", suggesting a phishing or social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jottigo.ru/strik?utm_term=reznor+unit+heater+manuals PDF link annotation
    • https://cdn.sqhk.co/xunijejozi/fiijdu5/vununamikepefelikoxuze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366969/normal_6002b08a2fcba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408997/normal_6059043edb8a4.pdfIn PDF document text
    • https://cdn.sqhk.co/wawabosamugo/jdghBla/drivers_education_test_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368495/normal_5fee8e0b75175.pdfIn PDF document text
    • https://cdn.sqhk.co/xutujipux/Kheiav5/troll_level_ideas_mario_maker_2.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/Ghgghhh/club_factory_online_shopping_app_review.pdfIn PDF document text
    • https://cdn.sqhk.co/zivupowixede/gi9jcgc/wakegatijafugukupixufu.pdfIn PDF document text
    • https://cdn.sqhk.co/pulazapusaw/bjezcgg/pepakikekanejalititukew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_6010110f6916e.pdfIn PDF document text
    • https://cdn.sqhk.co/fowifabibu/d4Zx12Z/golden_robot_car_transforme_futuristic_supercar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405902/normal_5ffbbdf92d651.pdfIn PDF document text
    • https://cdn.sqhk.co/wovenebi/qyijixS/20521533090.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosudav/9b7fiiW/free_litecoin_gain_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/pBgeibJ/jigawuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389358/normal_5ffaed49936fb.pdfIn PDF document text
    • https://cdn.sqhk.co/nigigeje/diea0oM/minecraft_anti_world_er_plugin.pdfIn PDF document text
    • https://cdn.sqhk.co/fisejadiruw/djc4bzH/94253532400.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sazomo/bluestacks_vs_android_emulator.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/can_you_descale_a_keurig_2.0_with_vinegar.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/wivajanibobu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C79A 4864 bytes
SHA-256: 4778d2e3d43dd3e090ff3b848c9c9fa6ca39120d3fb98568d76d9633745826eb
font_01_sfnt_off0001d7f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D7F4 11824 bytes
SHA-256: 6d32cd61fffd0187bded5d1f09eff5650646b2b5b6dec390109c2afc14287939
font_02_sfnt_off0002002a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2002A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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