Malicious PDF — malware analysis report

Static analysis result for SHA-256 990821ed5880327a…

MALICIOUS

PDF

71.6 KB Created: 2021-02-20 03:59:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: dc023c24ab91316dd6a99bc1719762fe SHA-1: 2bffdaf337b0d29f1acb6bc895fad74254f26c3e SHA-256: 990821ed5880327aed27e9bfc3934c1ed4d680de868a23bf2d433c8f1921cfd3
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. The embedded URL and numerous other URLs suggest a phishing or credential harvesting attempt, disguised as information about car specifications. No scripts were extracted, but the presence of external URLs points to a potential download or redirection to a malicious site.

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://leonvi.ru/123?utm_term=2013+ford+mustang+shelby+gt500+performance+specs PDF link annotation
    • https://cdn.sqhk.co/zumedizojas/yJkkgja/use_google_contacts_in_outlook.pdfIn PDF document text
    • https://cdn.sqhk.co/tononapiwaso/aF61Igf/risiti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374956/normal_5fce16b10b0c2.pdfIn PDF document text
    • https://cdn.sqhk.co/ragonujip/Bidghid/2d_battle_simulator_mod_apk.pdfIn PDF document text
    • http://kefovatoxag.22web.org/12884368981.pdfIn PDF document text
    • https://cdn.sqhk.co/pobumepova/hhgfhaK/washington_state_hockey_jersey.pdfIn PDF document text
    • https://cdn.sqhk.co/kamugututu/gHBgcjf/luzumakenesiwagasa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387929/normal_600bc5250a15f.pdfIn PDF document text
    • http://lufatomitonad.22web.org/i_m_just_a_bill_worksheet_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468843/normal_5ff13fc5cca03.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410432/normal_5fcef82d9b01d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/strategy_games_android_best.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/family_tree_worksheet_esl.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/99874165812.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/76225382244.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F4 6328 bytes
SHA-256: b07d96db47d7677ac1d81467bfdd330fc1f8497c538fa67a37f078e2e04ee1b4
font_01_sfnt_off0000eb60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB60 10996 bytes
SHA-256: 5f4defc71c691973241de3c6a0260d65a9716f736eef874c048d490d8bfee6ab