Malicious PDF — malware analysis report

Static analysis result for SHA-256 8592dc332c2dea87…

MALICIOUS

PDF

87.7 KB Created: 2021-04-12 23:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ee396751ab904d3a31faca0b187167d0 SHA-1: 244231acbf5b02881f59df6cd9fe59c388f52a16 SHA-256: 8592dc332c2dea87e85cf9cd7b1671e6ef029a0e7ea807a5915d519b3598e6c6
146 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, with one prominent URL pointing to a domain associated with phishing and malware distribution. The presence of a callback lure heuristic suggests the document may also be used for social engineering to extract sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/strik?utm_term=powerwise+qe+36v+charger+troubleshooting PDF link annotation
    • http://datinge.site/69433222680lo19g.pdfIn PDF document text
    • http://digitalmicroteter.xyz/netflix_account_management1k6j1.pdfIn PDF document text
    • https://cdn.sqhk.co/vonitumefide/5wZmKPd/update_software_for_pc_windows_7_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xororasomig/jjeogcy/marketing_plan_pitch_deck_examples.pdfIn PDF document text
    • http://kinoxca.xyz/rixemestsk0i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368251/normal_600d78ed9b7f5.pdfIn PDF document text
    • http://tvoyoproc.fun/19202685006nhk7h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420470/normal_60567cebacf3d.pdfIn PDF document text
    • http://irisca.online/vikodirenewuwofejilakerex8xm8x.pdfIn PDF document text
    • https://cdn.sqhk.co/rukububibon/fgU69Q6/depewes.pdfIn PDF document text
    • http://nageninusexex.22web.org/povukokoxebusisituzel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://77701ba7-c5ad-4750-ab17-5b03548f7fc0.filesusr.com/ugd/9a242c_f40632ff519341039f87d2aa63b2d6a5.pdf?index=trueIn PDF document text
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_7bc319a61d834896b6553204c54fe56d.pdf?index=trueIn PDF document text
    • http://zonidagaxa.epizy.com/84685087666.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/como_hacer_la_conclusion_de_un_proyecto_de_investigacion_ejemplo.pdfIn PDF document text
    • http://fifusudevop.rf.gd/funny_monkey_cartoon_videos.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/15738089114.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_off000113d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D6 5796 bytes
SHA-256: f0f9adf8e611b3aa6fcd4b449f15baf681f317aa96575f5a643b49e184d993d5
font_01_sfnt_off000127a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A5 11856 bytes
SHA-256: 0c5d7609b23d1375a04f7d9aba999a1a8f6bde2add3e274f9e1f9d8799f9bddc

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