Malicious PDF — malware analysis report

Static analysis result for SHA-256 98fcdc510b23be80…

MALICIOUS

PDF

80.6 KB Created: 2021-03-02 18:51:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 915c3f4b983dd91422bbd48ec0379dcf SHA-1: 8310a67740acb5d419a79478cdba1922a45a97bd SHA-256: 98fcdc510b23be80ffd2f6571b0be48705f2c17abf4b3e3ad4d4e89a732df7dc
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'fokemale.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a lure to download a secondary payload.

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://fokemale.ru/strik?utm_term=1993+kenworth+t600+wiring+diagrams PDF link annotation
    • https://cdn.sqhk.co/kululojilo/gdjaa4z/wedding_cakes_near_me_prices.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496828/normal_600f154901433.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422367/normal_600ffb3a64d88.pdfIn PDF document text
    • https://cdn.sqhk.co/maputaliki/4JggkqX/niretudo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463810/normal_5fedd83f24a73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392439/normal_6025ed7daed60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444386/normal_60028d785a7ce.pdfIn PDF document text
    • https://cdn.sqhk.co/bulunazi/egejgps/simple_gluten_free_birthday_cake_recipe.pdfIn PDF document text
    • http://navalny.design/93503507458ftk2x.pdfIn PDF document text
    • http://ruwegekugite.22web.org/vomebukigiwopixotafakeb.pdfIn PDF document text
    • https://cdn.sqhk.co/romafime/RhdEhfy/xukogijavit.pdfIn PDF document text
    • https://cdn.sqhk.co/dikozogub/ifijhaE/96258502999.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390051/normal_5ff65c0e3726b.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
    • http://banugigo.epizy.com/dymo_letratag_100h_plus_handheld_label_maker_for_office_or_home.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/coreldraw_graphics_suite_2018_keygen.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/material_safety_data_sheet_formalin.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_off0000edbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBE 5724 bytes
SHA-256: 3310c37a34f0a117fc7d78b315659d7f5a39948706f34565dcb09a3d6e0d23c2
font_01_sfnt_off00010114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10114 11496 bytes
SHA-256: dab35e378931885a1451f4eb6b8bcddc6ed72cdee3b706259f85986b87e7db0a
font_02_sfnt_off000126c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C0 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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