Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf0e43254427c596…

MALICIOUS

PDF

92.3 KB Created: 2021-01-10 00:38:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09a58972f5b72552f6d5d13a2c4b8e74 SHA-1: efec1bb69e76fc7cf86bbc96bd367dbd8562168a SHA-256: cf0e43254427c596dc35e8e3fd94df88c7f1e9a29ed43210079bbe04e612bd54
184 Risk Score

Malware Insights

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

This PDF document contains multiple embedded URLs, one of which is identified as a known malicious redirector. The document body text is obfuscated and appears to be a lure for the embedded link. The primary function of this file is to redirect users to malicious infrastructure, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/aws?utm_term=guitar+chord+sheets+for+beginners
    • https://site-1175702.mozfiles.com/files/1175702/59456414002.pdf
    • https://site-1174826.mozfiles.com/files/1174826/64604872012.pdf
    • https://fodorofofojep.weebly.com/uploads/1/3/4/7/134769626/096bf8.pdf
    • https://site-1176369.mozfiles.com/files/1176369/worldsbk_tv_schedule.pdf
    • https://site-1177285.mozfiles.com/files/1177285/warpath_movie_2020_cast.pdf
    • https://vodiwisilob.weebly.com/uploads/1/3/2/6/132681054/3218998.pdf
    • https://site-1178703.mozfiles.com/files/1178703/biruritezesazenuvuza.pdf
    • https://cdn.sqhk.co/bitaxukezor/mehdhjc/88948720430.pdf
    • https://site-1176005.mozfiles.com/files/1176005/stylit_dress_up_styling_game_mod_apk.pdf
    • https://site-1168164.mozfiles.com/files/1168164/bike_race_bike_blast_rush_mod_apk_download.pdf
    • https://cdn.sqhk.co/fuwifemi/qjgghTO/super_mechs_game_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wekibik/44691217056.pdf
    • https://s3.amazonaws.com/kotodur/xekejekadulazolixixerawed.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d8c.bin
ea3836b4016887e15e1702d3193bf9818e670723b62baf327434a62a03422d96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8C 5420 bytes
font_01_sfnt_off00011fee.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEE 1800 bytes
font_02_sfnt_off0001287b.bin
567145000fd577ae78c082ade5add2e5bef05373e0570eac36fa08ed82066abc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1287B 11068 bytes
font_03_sfnt_off00014e66.bin
1ffca1ef16be5e2ec436e77f9211a88ad3199dc781cb76600401cc2e2c7dce6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E66 16140 bytes

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