Malicious PDF — malware analysis report

Static analysis result for SHA-256 c846890e89914c83…

MALICIOUS

PDF

70.5 KB Created: 2021-04-05 03:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8d9bb4b0b8f62e563ea79e97fb6be56 SHA-1: 99a42c9e221bdff8ec465f03effd6387c98e837d SHA-256: c846890e89914c83df4cb8361f55243920e3870fb15462e7f1d784106ad6b84e
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 embedded URL `https://soxebez.ru/123?utm_term=android+sdk+command+line+tools+not+working` suggests a phishing or credential harvesting attempt, disguised as a technical document. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into visiting a compromised site.

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://soxebez.ru/123?utm_term=android+sdk+command+line+tools+not+working
    • https://static.s123-cdn-static.com/uploads/4382613/normal_5fe23ec8d3d07.pdf
    • https://cdn-cms.f-static.net/uploads/4446781/normal_6029036c4fe83.pdf
    • https://static.s123-cdn-static.com/uploads/4403685/normal_5ffec3e195ba1.pdf
    • https://static.s123-cdn-static.com/uploads/4475216/normal_5ffaa711e60d1.pdf
    • https://cdn.sqhk.co/nulogoxeja/rjd6JBm/apps_that_give_you_gift_cards_for_walking.pdf
    • http://kavelizopepi.mywebcommunity.org/80090958284.pdf
    • http://xepidenad.scienceontheweb.net/norton_anthology_of_american_literature_shorter_9th_edition_volume_1.pdf
    • http://zaluxujuso.iblogger.org/68829744934.pdf
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5fd28ab66f555.pdf
    • http://fugoverud.iblogger.org/ansys_fluent_tutorial_book.pdf
    • https://cdn-cms.f-static.net/uploads/4393188/normal_603840912d6bb.pdf
    • https://cdn.sqhk.co/xumupojamax/OhdEif1/pixel_racer_hack_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://funazowo.rf.gd/95074146338.pdf
    • https://s3.amazonaws.com/garorowa/dihybrid_cross_guinea_pig_worksheet_answers.pdf
    • https://s3.amazonaws.com/fixararololu/arterial_ulcer_treatment_guidelines.pdf
    • https://s3.amazonaws.com/tozaduliwubega/singer_ingenuity_7436_price.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_off0000d6b8.bin
af263590ae04328328e58062aa5374b301471196020bf87c034225e6c24e259d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B8 5404 bytes
font_01_sfnt_off0000e917.bin
f63fd5cd7d06d01265df072ae23c28703f6fef708f9349f58fd8a2643fa179d6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE917 10500 bytes