Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaa97ee33b55494f…

MALICIOUS

PDF

82.5 KB Created: 2021-02-21 07:21:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 089d71f4f1a1ebc79b357dc447935eba SHA-1: 9cff878646361cb4302cf4255fdada98881bb5a5 SHA-256: aaa97ee33b55494fdf0498aa22e7551597f8d25863194b86dbfe0ae9e4a456a6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. The presence of external URIs and the link farm heuristic suggest the document is designed to redirect users to malicious sites.

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://baarspo.ru/strik?utm_term=factory+reset+iomega+storcenter+ix2 PDF link annotation
    • https://cdn.sqhk.co/tategupet/jaieTjh/play_bubble_shooter_online_unblocked.pdfIn PDF document text
    • http://dihtyar.online/education_board_2019_marksheetltr6a.pdfIn PDF document text
    • http://ipatovaalena.ru/994360037658ddfq.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/eijLrjc/54695954622.pdfIn PDF document text
    • https://cdn.sqhk.co/wewowedim/ie8jgMV/78939978638.pdfIn PDF document text
    • https://cdn.sqhk.co/punipopi/jijiha1/vemomudofujoxikak.pdfIn PDF document text
    • https://cdn.sqhk.co/boxadiweteve/hhqggcQ/download_game_angry_shark_2016_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/gg9jigf/cute_puppies_pictures_to_draw.pdfIn PDF document text
    • https://cdn.sqhk.co/josedinis/pXjix5k/39477781955.pdfIn PDF document text
    • https://cdn.sqhk.co/torujazelome/hhMii7u/31230846648.pdfIn PDF document text
    • http://mainsale.pro/how_to_apply_feminist_theorymg2kp.pdfIn PDF document text
    • http://price-list.moscow/88122474423dlebv.pdfIn PDF document text
    • https://cdn.sqhk.co/rigowodikot/apjfgid/medieval_wars_2_game.pdfIn PDF document text
    • http://scarcebook.com/26453893865ydznn.pdfIn PDF document text
    • https://cdn.sqhk.co/fabukujeb/jGiijgc/32141880117.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwebobit/z0jjuif/39555338326.pdfIn PDF document text
    • http://xrootunited.com/transfer_vsdx_file_to8arkc.pdfIn PDF document text
    • https://cdn.sqhk.co/rerunagakiz/dxhj4gg/81057662697.pdfIn PDF document text
    • http://copyright-supporthelp.com/jufaserejadumut6nqy.pdfIn PDF document text
    • http://jotepuxigavof.iblogger.org/burdened_with_crossword_answer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0001036c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036C 5344 bytes
SHA-256: afd34bc3b749739abcdd9a0dc9d460ae40057012408d2dc27b191b913433241b
font_01_sfnt_off00011597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11597 11864 bytes
SHA-256: 7f2eb194a4370710d11a5f73b6f28af88509298524c91065a7e8c546314fff07

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