Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9746bafd8c24710…

MALICIOUS

PDF

74.8 KB Created: 2021-01-11 23:01:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13fee833eba5699555f5cf29ab410171 SHA-1: c3206f676d0f24e7b1871ca099a64ee7db7f2c13 SHA-256: c9746bafd8c24710e9b3ed2547e9b204fa152fd6954d6e99fed6e7428a332ce4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable hosting and are used in link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'Clorox performance bleach safety data sheet' and 'wkhtmltopdf', likely serving as lures to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffnew.ru/aws?utm_term=clorox+performance+bleach+safety+data+sheet
    • https://site-1174988.mozfiles.com/files/1174988/update_phones_custom_configuration.pdf
    • https://site-1168368.mozfiles.com/files/1168368/29636829905.pdf
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f88ddb7b2e16.pdf
    • https://cdn.sqhk.co/badaxiloru/chdgdgf/34918992216.pdf
    • https://midagadin.weebly.com/uploads/1/3/1/3/131381693/detarixon.pdf
    • https://cdn.sqhk.co/digiwejasipu/jejiunx/tesakaxotelopopegopujuvu.pdf
    • https://wawupibinotab.weebly.com/uploads/1/3/4/9/134900246/nilevotetuminaliji.pdf
    • https://site-1173894.mozfiles.com/files/1173894/free_fire_4k_wallpaper_download_for_mobile.pdf
    • https://cdn-cms.f-static.net/uploads/4368266/normal_5f953c89ba3bc.pdf
    • https://site-1171694.mozfiles.com/files/1171694/ikea_dresser_hemnes_black.pdf
    • https://bijasekimuku.weebly.com/uploads/1/3/4/5/134593614/fujumikoza.pdf
    • https://site-1173607.mozfiles.com/files/1173607/mugaxajosopodopufug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wewuxuviwar/visadi.pdf
    • https://s3.amazonaws.com/gazivemon/40636955596.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_off0000d087.bin
6a7e9eb6c9d52108ee1170b35081e473f23b39dac3f322b70ce0316763017cfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD087 5612 bytes
font_01_sfnt_off0000e36e.bin
51fa0e1afa3dc73d33d9ca47dff3a8edb0cf6192f81008982718b5bf275bc029		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE36E 10876 bytes
font_02_sfnt_off0001089a.bin
7030d30f628d8c5896a69f6f95911b0510c7d1fb76724ffcc24899878d9570a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1089A 16236 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.