Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2bf3aec9fb293c9…

MALICIOUS

PDF

67.0 KB Created: 2021-01-13 07:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2d709244f947213fbc5da224be9cf8cc SHA-1: c36ee7ffcdf1f41bde40292f98a6b400904c63d2 SHA-256: d2bf3aec9fb293c944d8df814ccb48fa08412b1b361b5b1ae6204465f3f0b0de
96 Risk Score

Malware Insights

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

The file is a PDF with a high ML classification and ClamAV detection indicating maliciousness. It contains an embedded URI pointing to 'https://traffnew.ru/123?utm_term=chrome+snake+unblocked', which is likely a phishing or malware distribution URL. The document body is heavily obfuscated, but the presence of the URL and the overall detection suggest an attempt to trick the user into visiting 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://traffnew.ru/123?utm_term=chrome+snake+unblocked PDF link annotation
    • https://site-1222001.mozfiles.com/files/1222001/epidural_hematoma_treatment_guidelines.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/segifelesilokunuva.pdfIn PDF document text
    • https://cdn.sqhk.co/waxipefimafa/iegjhkq/origami_ninja_star_easy_step_by_step.pdfIn PDF document text
    • https://cdn.sqhk.co/loxinesupiva/f5hgFkW/exoplanets_discovered_in_the_last_5_years.pdfIn PDF document text
    • https://cdn.sqhk.co/wenavuso/dcL3mie/guwosujebonopivevupozo.pdfIn PDF document text
    • https://site-1178961.mozfiles.com/files/1178961/72349169750.pdfIn PDF document text
    • https://dewufixibofapez.weebly.com/uploads/1/3/4/5/134596153/4dd5856e.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/jozetej/xinofaginiledudojavonu.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/my_free_mp3_player_music.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/12th_chemistry_formulas_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/cydia_iphone_7.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/jizodusa.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/28146111504.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_off0000ca3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA3F 5288 bytes
SHA-256: 75e089de8f1571391b9218e42f2305813c71c94208e2db7e368f898124d114e8
font_01_sfnt_off0000dc01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC01 10412 bytes
SHA-256: 688e892a9a15dd0e4e5d6f4beb9419e06ef22715f1af9279d7fcecb93f71acf1

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