Malicious PDF — malware analysis report

Static analysis result for SHA-256 bffcd9e761f02a05…

MALICIOUS

PDF

77.9 KB Created: 2021-03-01 08:03:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 77634ee22098d19ca4f96567241d783a SHA-1: 69166875f13d8ba4d7983b2a34f67cba57f39196 SHA-256: bffcd9e761f02a05851eca9810d1d96d317e6d86820b17f6add9b5c9a29680ea
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, and it contains a large number of external links, many hosted on disposable domains. The document body, though heavily obfuscated, appears to be a lure related to obtaining an IP address, directing users to a link farm. The presence of numerous external links suggests an attempt to redirect users to potentially malicious sites for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 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.
  • 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://seumenha.ru/123?utm_term=how+to+get+my+ip+address+in+command+prompt PDF link annotation
    • http://vogujefaxuwel.22web.org/80404488072.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/iez0Rmd/assistive_touch_home_button_only.pdfIn PDF document text
    • https://cdn.sqhk.co/wularumijif/CFxShhu/wobexidabatuga.pdfIn PDF document text
    • https://xekobemakisusij.weebly.com/uploads/1/3/1/4/131438823/namaxagujafof.pdfIn PDF document text
    • https://cdn.sqhk.co/penuvipaw/gvrLQib/jlab_neon_wireless_on-_ear_headphones_white.pdfIn PDF document text
    • https://vigoruso.weebly.com/uploads/1/3/4/1/134131386/adf29.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/fzhj24s/download_elemental_dungeon_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/VShbjjp/nicki_minaj_songs_2014.pdfIn PDF document text
    • https://fabofosozani.weebly.com/uploads/1/3/4/8/134870462/fovizoz.pdfIn PDF document text
    • https://cdn.sqhk.co/wesuwajil/bZhdvhj/texiwesusawenuj.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/1i8diaf/romantic_love_music_ringtone_mp3_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xonafelog/hcfhijc/29424966389.pdfIn PDF document text
    • https://cdn.sqhk.co/rogudokives/7LhcijW/tumblr_search_filter.pdfIn PDF document text
    • http://budisafi.22web.org/26395780902.pdfIn PDF document text
    • https://zevebijupaxize.weebly.com/uploads/1/3/4/7/134754497/kawijoza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lupebesu/68651262819.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/81033777208.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/jemidojenixisepogokizuwil.pdfIn PDF document text
    • http://rozesefotuduwef.epizy.com/11371311781.pdfIn PDF document text
    • http://kuwanuzoniwod.rf.gd/2610148166.pdfIn PDF document text
    • http://fofifalog.rf.gd/giripobe.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/67637662939.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/14657498733.pdfIn PDF document text
    • http://xufenazaliwe.epizy.com/vipipexaduwe.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E3 5516 bytes
SHA-256: 55cc4c66e8dda1324a2aa06dce8a7f225395de670e0c4df8792b88cf3c1ff564
font_01_sfnt_off000105a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A9 10580 bytes
SHA-256: dedd2a70c5465253fd85ad7f8624f76306d16615293596c8ad77d2d50d44c61f

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