Malicious PDF — malware analysis report

Static analysis result for SHA-256 496d59b909c17341…

MALICIOUS

PDF

82.2 KB Created: 2021-01-15 15:48:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ac899ae44d8b38879f04c09b976d879 SHA-1: d9cded4e5686325af0eba1edab2e07bc18d14fbf SHA-256: 496d59b909c173411bb2203816771fbdb350c3d401c52a26d54fe60e8094e31e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely for phishing purposes. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious 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://traffset.ru/aws?utm_term=graph+paper+printable+8.+5x11+full+sheet
    • https://site-1188771.mozfiles.com/files/1188771/grass_cutter_machine_honda_company.pdf
    • https://site-1175753.mozfiles.com/files/1175753/nupifolisumituletaw.pdf
    • https://static.s123-cdn-static.com/uploads/4391920/normal_5feb38c804dd6.pdf
    • https://site-1175229.mozfiles.com/files/1175229/downhill_toy_racing_monster_truck_videos.pdf
    • https://static.s123-cdn-static.com/uploads/4367912/normal_5fdfb3b16910c.pdf
    • https://static.s123-cdn-static.com/uploads/4475872/normal_5ff718533f16b.pdf
    • https://site-1177229.mozfiles.com/files/1177229/digital_marketing_segmentation_approaches.pdf
    • https://site-1176205.mozfiles.com/files/1176205/light_grey_paint_colors_for_bathroom.pdf
    • https://site-1168511.mozfiles.com/files/1168511/devil_hunter_eternal_war_codes.pdf
    • https://site-1168239.mozfiles.com/files/1168239/iosh_managing_safely_exam_questions_and_answers.pdf
    • https://site-1167954.mozfiles.com/files/1167954/witcher_2_crafting_runes.pdf
    • https://site-1178385.mozfiles.com/files/1178385/why_should_we_learn_business_management.pdf
    • https://site-1173509.mozfiles.com/files/1173509/cancel_sling_after_free_trial.pdf
    • https://site-1175261.mozfiles.com/files/1175261/90258429458.pdf
    • https://static.s123-cdn-static.com/uploads/4370746/normal_5fc5a838780cf.pdf
    • https://site-1177634.mozfiles.com/files/1177634/telafosopovuzojutofi.pdf
    • https://site-1173169.mozfiles.com/files/1173169/gaxarepev.pdf
    • https://site-1182082.mozfiles.com/files/1182082/44711269112.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off000103d6.bin
a57e1e0f0df9008bdcfaf7d0f0fb2a2bbbc410ea68f7e6c589ae883b452b1971
pdf-font-stream PDF embedded font (sfnt) at offset 0x103D6 5628 bytes
font_01_sfnt_off00011704.bin
47e24398941d9573ec00a6a72b741cf17f192975adbef62c45fad7957fb52c8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11704 10736 bytes