Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0c55b515b9e3984…

MALICIOUS

PDF

78.2 KB Created: 2021-04-23 07:22:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: eb6bbe6d710ee7f6b21d13fae6951078 SHA-1: 2c07fb4e85963b4ee62a57580dcfafeac75cb103 SHA-256: a0c55b515b9e3984c5d2e19ad818bc1f4d447391133d6ee54015b3838f5c27ad
206 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm with numerous external links, one of which is a suspicious URL pointing to a potential phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a lure related to addiction recovery, likely intended to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • 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) or Microsoft license-boilerplate 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://pelibifir.ru/strik?utm_term=what+are+the+12+steps+to+recovery+from+addiction PDF link annotation
    • https://cdn.sqhk.co/kajemuwasutu/hhjfHgi/32441608705.pdfIn PDF document text
    • https://cdn.sqhk.co/togareguko/6bdQMJS/muzidajetilenanajovaso.pdfIn PDF document text
    • http://jovopomutulilo.medianewsonline.com/asus_rt-ac66u_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/takoxuwal/jcbRoin/gotowebinar_attendee_report.pdfIn PDF document text
    • https://cdn.sqhk.co/monazaxumol/jgfVggU/63567252500.pdfIn PDF document text
    • https://cdn.sqhk.co/vavewiren/nigih0d/local_car_races_near_me_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/hiwk4hi/30158079038.pdfIn PDF document text
    • http://dijepeg.22web.org/probability_tree_diagram_worksheet_grade_7.pdfIn PDF document text
    • https://cdn.sqhk.co/vapumojemov/SZjacja/sculpting_hair_in_blender_2._8.pdfIn PDF document text
    • https://cdn.sqhk.co/bipozipo/jcgfq1X/video_player_apk_android_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/pubabolab/XhbWNV9/33775178167.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/kiremefegonar/bose_acoustimass_10_crossover_frequency.pdfIn PDF document text
    • https://88bec3ce-9cdd-4818-a95b-bcf8ac49d1e7.filesusr.com/ugd/72df48_35e616f5a11e441388928bfd5c9947af.pdf?index=trueIn PDF document text
    • http://lodumojokexiku.onlinewebshop.net/wadunegu.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/prince_of_persia_full_movie_download_in_hindi_480p_filmyzilla.pdfIn PDF document text
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_edeef8bd83fc482cb4a940fe7e3d017d.pdf?index=trueIn PDF document text
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_e614b253c7944fcebb3d5c8d616f0b84.pdf?index=trueIn PDF document text
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_916abd6554e149c3826113c9128def30.pdf?index=trueIn PDF document text
    • http://zijurape.atwebpages.com/25052033100.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/android_device_manager_google_play_store.pdfIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_a26eee6dfd5846d0ae4dd4192de4bba0.pdf?index=trueIn PDF document text
    • http://merojupamen.epizy.com/cmp_cable_gland_catalog.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AF 5720 bytes
SHA-256: db3c3128888c1f5a3e4ef4670699d562d00a303df1f1b8109a36cdb5427b5129
font_01_sfnt_off0001071b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071B 10592 bytes
SHA-256: 9f9f6695d119d6de12fe8b465de6b752590d0c582119e9eaf3df8a97f02f470e

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