Malicious PDF — malware analysis report

Static analysis result for SHA-256 61aa6d67cc554896…

MALICIOUS

PDF

78.4 KB Created: 2021-03-28 08:13:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bf522e450c9d8e78f8596d00a2da738 SHA-1: 5358b05d3e7363d1d0fa3dca5d792ae4ca44f171 SHA-256: 61aa6d67cc55489670499e0e8893db7be816315e4f15f7dac3a13e5acc03a528
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'irrational thinking patterns' and includes the malicious URL.

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://pelibifir.ru/award?keyword=irrational+thinking+patterns+pdf
    • https://cdn-cms.f-static.net/uploads/4420764/normal_5fe9b5c254543.pdf
    • https://ruwizugaxuluba.weebly.com/uploads/1/3/4/7/134759804/297071.pdf
    • https://cdn.sqhk.co/butuxolevu/NibQv7j/sofopanalutipolefol.pdf
    • http://zarabatyivat.ru/2019_telugu_calendaru5801.pdf
    • https://wivewuti.weebly.com/uploads/1/3/4/6/134698804/bawozeforobulu_semaja_lakumubavum.pdf
    • https://cdn-cms.f-static.net/uploads/4485807/normal_60293a64a0b50.pdf
    • https://cdn.sqhk.co/lakekomum/zJCJgcE/sawusubabomimubasobome.pdf
    • https://cdn.sqhk.co/vukobefebu/igkjfBQ/security_access_control_procedure.pdf
    • https://cdn.sqhk.co/vixemujomu/gPgcKij/wowuwifar.pdf
    • https://cdn.sqhk.co/gepeduvo/0jgIibV/strategic_management_definition_by_porter.pdf
    • https://cdn.sqhk.co/koxopumo/DHgfihS/35769267938.pdf
    • http://rebelliona.online/roland_td30_for_sale_second_hando2cz8.pdf
    • http://secureappeal.com/wiloretajovecmied.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b5eff787-123b-4b7e-9250-256413f2a15d/empire_warriors_tower_defense_td_strategy_games_hack.pdf
    • https://uploads.strikinglycdn.com/files/6e6abe00-2e32-4f9f-9ba6-6701d7d56213/banned_money_secrets_richard_dotts.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcdc.bin
897e580a20074509389818e2cdd162d2cd31283a20a32e8dd4fd10f5bbd06ca7
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDC 5304 bytes
font_01_sfnt_off0000eee0.bin
58a240596295ed8623e2921a4d2881af756ef828dca07416b9622c0ea4bd8714
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE0 10140 bytes
font_02_sfnt_off000111ea.bin
6801a7ac52478f31cdef02b26136413892a8b0142cf5f4477d928a36829cad3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x111EA 17052 bytes