Malicious PDF — malware analysis report

Static analysis result for SHA-256 82dab2a94afee9f7…

MALICIOUS

PDF

75.1 KB Created: 2021-03-14 15:44:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 025b022c54d2a52d2591e5b33f83854e SHA-1: 75485cc87b9974921d72dd0af347072cd3776a49 SHA-256: 82dab2a94afee9f7e03e9d06c96e46a3785a0e200fb5d4a72682fe2bf97b810c
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The sample was identified as malicious by ML classifiers and ClamAV, with high confidence. Heuristics indicate it functions as a link farm and a callback phishing lure, directing users to external URLs. The document body is heavily obfuscated, but the presence of external URIs and the 'SE_CALLBACK_LURE' heuristic strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jacksth.ru/strik?utm_term=nnat+test+scores PDF link annotation
    • https://cdn.sqhk.co/lomasamube/ljfWajc/nipoj.pdfIn PDF document text
    • http://mirunex.iblogger.org/dikoziragena.pdfIn PDF document text
    • http://roflan.site/konosuba_light_novel_volume_1pb9hk.pdfIn PDF document text
    • https://nipetetoxijekuj.weebly.com/uploads/1/3/4/7/134718304/870405.pdfIn PDF document text
    • http://silofabinewu.22web.org/tales_from_the_loop_rpg_review.pdfIn PDF document text
    • http://cardio-active.site/loramexusaxuremoziprp57.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/eRieij3/bazemutojebepupa.pdfIn PDF document text
    • https://xesevurodat.weebly.com/uploads/1/3/0/9/130968943/b4658.pdfIn PDF document text
    • https://cdn.sqhk.co/rumoligodo/ihgcIZV/wwe_battlegrounds_locker_codes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sivadanoxibive.epizy.com/tasosowakamojuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cce961e-60a2-461a-b547-ddd01069df76/how_to_become_cisco_certified.pdfIn PDF document text
    • http://vuruwabudakase.epizy.com/latest_aerobics_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4220f82c-7f9b-4d11-9c58-20204e914252/how_to_play_violin_scales.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/nervous_system_worksheet_7th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/sportster_service_manual_free_download.pdfIn PDF document text
    • http://muxofitum.rf.gd/94383864928.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/24820738025.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_off0000ea6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6E 4732 bytes
SHA-256: d731d2016b601aa0f4c25346c53d3661f234375059ba1d40f6ba93aec76de24d
font_01_sfnt_off0000fa93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA93 10928 bytes
SHA-256: 7c9e5a5d6792ac98c585874f4f07b47a359c02bd5af5b2851ca7418f45a8fac6

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