Malicious PDF — malware analysis report

Static analysis result for SHA-256 c28fdd44ecc8d1f0…

MALICIOUS

PDF

83.3 KB Created: 2021-05-07 03:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6eb2877b2177c281de063dc956e86f75 SHA-1: 533eebb50274235ffbf6ff1f34699b64f9f68c32 SHA-256: c28fdd44ecc8d1f077f99ea1846fdf48551bb3f574f99935df3dc1e969781ee8
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a legitimate document. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of an external URI suggests 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://baarspo.ru/strik?utm_term=boy+scout+chess+merit+badge+pamphlet
    • https://cdn-cms.f-static.net/uploads/4482009/normal_602ebbea9ca65.pdf
    • https://kavuxidawikux.weebly.com/uploads/1/3/4/0/134000359/mavasifilejebosow.pdf
    • https://cdn.sqhk.co/fugovigul/u2jc6d5/emulator_ps1_for_windows_10.pdf
    • https://cdn.sqhk.co/guletema/Cighdjb/audi_rs6_performance_2018.pdf
    • https://cdn-cms.f-static.net/uploads/4502819/normal_606b5234d1dc6.pdf
    • https://bamiwesuwo.weebly.com/uploads/1/3/5/3/135390748/ec30608.pdf
    • http://vashastrahovka24.ru/line_6_spider_iv_15_presets_listz0nbl.pdf
    • https://cdn-cms.f-static.net/uploads/4377371/normal_5fd0e568d4fd7.pdf
    • http://prosucre.pro/momorivefonotese1vyp.pdf
    • https://cdn-cms.f-static.net/uploads/4423752/normal_6062b0dba3bc1.pdf
    • http://particuliers-societegenerale.xyz/full_course_-_learn_english_grammar_lessons_for_beginners_elementary_intermediatey55ug.pdf
    • https://cdn.sqhk.co/jidulopavoji/giihhQq/can_i_freeze_pumpkin_pie_baked.pdf
    • https://cdn.sqhk.co/lidupusumoj/hck6idM/pogibosupilitaru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_9ba20cf014464fee9bf7274de60b6409.pdf?index=true
    • https://29fa80ab-3b21-46a5-a5c9-66d7a3d84e9c.filesusr.com/ugd/eb9fb8_366a67c969d748fca85b18f766dc1c8d.pdf?index=true
    • https://s3.amazonaws.com/zategafozasiru/cain_and_abel_oxid._it.pdf
    • https://s3.amazonaws.com/nimuwet/xactimate_level_2_certification_test_answers.pdf
    • https://s3.amazonaws.com/bisiku/hand_exercises_for_arthritis.pdf
    • https://s3.amazonaws.com/mejawiwomak/video_instagram_iphone_2018.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_off0001065b.bin
52594f0cbf4a785622ccd77ee10884d205ced89053cb4f5e822b97f2dbec2ea5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1065B 5780 bytes
font_01_sfnt_off000119e5.bin
84fa48db753a442a70c559a9883e73b4e008bc25203f9dd3f12019391ff04f6f
pdf-font-stream PDF embedded font (sfnt) at offset 0x119E5 10752 bytes