Malicious PDF — malware analysis report

Static analysis result for SHA-256 95cc11fbd8a7b2d6…

MALICIOUS

PDF

105.3 KB Created: 2021-03-27 14:27:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9265d50af7757e94a6e0bbae622ff5c0 SHA-1: 49e77693ade89c47a6a445333849c593d78aed1c SHA-256: 95cc11fbd8a7b2d6ec16ff46f2e68dc70960c9fedffe8924e29d86862ac4b110
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, including one to "dafemum.ru" with a "self esteem facts uk" keyword, suggesting a link farm or SEO spam tactic. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded links and the nature of the heuristics indicate an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/wix?keyword=self+esteem+facts+uk
    • https://cdn.sqhk.co/wosepimi/icvhhGr/fiwebetarogawamarebazixa.pdf
    • https://vawavujak.weebly.com/uploads/1/3/4/3/134350312/362609d8.pdf
    • https://cdn-cms.f-static.net/uploads/4465255/normal_5fea2451e1436.pdf
    • https://wefomupexe.weebly.com/uploads/1/3/4/4/134491092/rebujogameloxiz.pdf
    • https://rixukofet.weebly.com/uploads/1/3/4/1/134108779/14515c9.pdf
    • http://finipupote.mywebcommunity.org/sharepoint_online_tutorial_videos.pdf
    • http://xitodefigatefuj.medianewsonline.com/67372135827.pdf
    • https://cdn-cms.f-static.net/uploads/4407810/normal_6022b403b2697.pdf
    • https://jonipafatanepa.weebly.com/uploads/1/3/2/7/132741476/003acc1e3.pdf
    • https://cdn-cms.f-static.net/uploads/4376874/normal_6009bc8c5b9a5.pdf
    • https://nasuxixogidipan.weebly.com/uploads/1/3/4/7/134701521/mamojum.pdf
    • http://kovuzaxaf.medianewsonline.com/how_to_facebook_message_recovery.pdf
    • http://bopolubolef.mywebcommunity.org/52057864722.pdf
    • https://cdn.sqhk.co/ketifoseja/gBqo6ii/fimawuw.pdf
    • http://lebepufu.mypressonline.com/child_care_centre_business_plan_sample.pdf
    • https://tajaxaxiko.weebly.com/uploads/1/3/0/9/130969751/f31c5bfb9882531.pdf
    • https://xufiwelak.weebly.com/uploads/1/3/1/1/131164558/2c0055340d0.pdf
    • https://didiseripipake.weebly.com/uploads/1/3/4/3/134344006/tugana_rafokagunadaj_dudunifuzisovu_pejamimu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mozaninukokefef.onlinewebshop.net/how_to_calculate_van_der_waals_radius.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_off00015fd8.bin
cac9f6a94b2ef69e939cb788bfc180fd29f36cdfe47d29aeb94eaf09423124c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15FD8 5096 bytes
font_01_sfnt_off00017125.bin
322be8b44f599b54493b2502aa3e66d8d03b592092230846c7847d9f50d390d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17125 11356 bytes

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