Malicious PDF — malware analysis report

Static analysis result for SHA-256 391a1b468ba0ea2e…

MALICIOUS

PDF

76.5 KB Created: 2020-12-31 02:09:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 8292183c2da507c3b0e30bb441af7a53 SHA-1: ec30815fc3bb1b7a693188f06b231f1a9219c2e3 SHA-256: 391a1b468ba0ea2e25028d598261f50f96407f78f6b9c357f717fd67b694b4c7
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a suspicious domain, likely used to deliver a secondary payload or phish for credentials. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit users through a deceptive lure.

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://trafftec.ru/strik?utm_term=my+talking+dog+2+mod PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385235/normal_5fa566551e19a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393763/normal_5fa647a6c68ed.pdfIn PDF document text
    • https://cdn.sqhk.co/sononipo/idhdOja/steam_consumption_calculator_online.pdfIn PDF document text
    • https://cdn.sqhk.co/bofilewidil/ijGihje/17621804440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385612/normal_5f8ed7351b8fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_5fbcbe7852b90.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/bgjhcso/coin_counter_machine_for_sale_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388276/normal_5fdfc7bbad12a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1b0a0b3-2a12-4a7c-b67d-c13a89336aaf/ncdpi_science_standards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c5dcbdd-d90f-4414-b76e-a29129aae15b/witcher_blood_of_elves_chapter_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b1e8930-1fff-4368-aff5-69acb99149b2/22951920634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d38d77dd-0559-44d1-af6f-4ab3acb8ccb9/likert_scale_survey_statistical_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/113eaff9-4b85-41e8-9748-4f901d0d58d3/fukezesikos.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD099 5176 bytes
SHA-256: 50e3dc6766ec9013784cb3712b386faf21121695e5a9ee79b42301ae8cb0b79d
font_01_sfnt_off0000e241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE241 13972 bytes
SHA-256: 8e174b46653210fbd6f09c7f53f9a13ee292e1f3f8edb14ca29e9cd2d3c8fe17
font_02_sfnt_off00010e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6F 16160 bytes
SHA-256: 1614347a2a257260232bcde6383ed608ec68e4d120c8fb4aea84a7e7612d46b8

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