Malicious PDF — malware analysis report

Static analysis result for SHA-256 285c97d67c48811f…

MALICIOUS

PDF

71.0 KB Created: 2020-11-21 03:10:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf649aef2b9c7e3b467237c869647d5d SHA-1: 59749975417edc2667ec3a4ccf5e257cb000b0cf SHA-256: 285c97d67c48811fe4ad50b7c3fe2e18e08c3107ff33e36810103f01bf2992f2
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'real estate directory', reinforcing the 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://trafffe.ru/123?utm_term=real+estate+directory+rochester+mn
    • https://cdn-cms.f-static.net/uploads/4382620/normal_5f978fcb1d0d4.pdf
    • https://cdn-cms.f-static.net/uploads/4369493/normal_5fb83a6500590.pdf
    • https://cdn-cms.f-static.net/uploads/4385231/normal_5f907cda89360.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/zedilegol/duweduwatadejubosulor.pdf
    • https://s3.amazonaws.com/nosepevozux/xomevepukuz.pdf
    • https://s3.amazonaws.com/zeworibuzoza/adaptive_control_tutorial_petros_ioannou.pdf
    • https://s3.amazonaws.com/janodojivi/does_prenatal_vitamins_make_you_fat.pdf
    • https://s3.amazonaws.com/levumoduf/35746234665.pdf
    • https://s3.amazonaws.com/kimoweworape/19680381741.pdf
    • https://s3.amazonaws.com/tosasugokod/slim_ambition_keto_scam.pdf
    • https://s3.amazonaws.com/lakujusitejojet/movie_jatt_bollywood_movies.pdf
    • https://s3.amazonaws.com/wexoteluwag/83711545667.pdf
    • https://s3.amazonaws.com/wipotegadodorek/ed_thorp_beat_the_market.pdf
    • https://s3.amazonaws.com/baxegezivumi/tour_guides_synonym.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce04.bin
12c22d0293e64079302b25a397408667048b854248c7ecaa19fd2013535efbac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE04 5076 bytes
font_01_sfnt_off0000df14.bin
607c5180ed47c3e2ae00d5bb7d42bd0ce52a557e11a715c6274eea04d9286b4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF14 9980 bytes
font_02_sfnt_off00010131.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10131 4324 bytes

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