Malicious PDF — malware analysis report

Static analysis result for SHA-256 661114303e1e6b1d…

MALICIOUS

PDF

86.4 KB Created: 2021-01-10 13:20:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 479d229f881a8b0f0b1b1387d1da1a02 SHA-1: ca8c50e9af95c451f3bfcb349d1fa04c66a82026 SHA-256: 661114303e1e6b1d121f619d86dccfc974a58dcc2531d3fd5213f722148ff270
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to 'traffset.ru', which is flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The document body, though heavily obfuscated, contains text related to a novel, suggesting a lure to drive traffic to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/123?utm_term=house+of+hades+read+online+novel+77 PDF link annotation
    • https://site-1176512.mozfiles.com/files/1176512/garena_shell_top_up_bangladesh_bkash.pdfIn PDF document text
    • https://site-1174957.mozfiles.com/files/1174957/fonts_for_instagram_bio_app.pdfIn PDF document text
    • https://site-1173682.mozfiles.com/files/1173682/pop_star_dress_up_games.pdfIn PDF document text
    • https://site-1172267.mozfiles.com/files/1172267/monkey_fire_type_pokemon.pdfIn PDF document text
    • https://site-1177879.mozfiles.com/files/1177879/dwayne_johnson_movies_on_hulu.pdfIn PDF document text
    • https://site-1166674.mozfiles.com/files/1166674/csir_net_syllabus_for_mathematics_2020.pdfIn PDF document text
    • https://site-1166084.mozfiles.com/files/1166084/81865296049.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
    • https://s3.amazonaws.com/fomaralunex/aliexpress_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/descriptive_writing_prompts.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/sesumuge.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/hannah_montana_games_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/voodoo_doll_game_torture.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/dofapopotisemolowinu.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/11278905685.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/aide_memoire_photographique.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_off00010826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10826 4896 bytes
SHA-256: 05719bb3ea6f9d1eede1d023437cac91e5cf01eeb029e3992c6224579da07df4
font_01_sfnt_off000118c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C5 11232 bytes
SHA-256: de140491b2c1b29b34c1da5e40313c845aa3c0e40874d318b24ee628fedbd866
font_02_sfnt_off00013e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E2A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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