Malicious PDF — malware analysis report

Static analysis result for SHA-256 812e85b85d22d108…

MALICIOUS

PDF

81.8 KB Created: 2021-05-03 18:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b4c500264fa5beac91df2d4a2ac66269 SHA-1: 24ce9c3662def0f2c47ded7e2918525d4ae86af4 SHA-256: 812e85b85d22d1080f1f146f93ba13a517ef887165da05c71644ce58d5e78bbc
146 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and a lure related to a popular movie franchise, suggesting a phishing or social engineering attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, and the 'SE_CALLBACK_LURE' heuristic suggests a callback phishing or tech-support scam context. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://xezojetit.ru/strik?utm_term=is+there+going+to+be+a+new+harry+potter+movie+coming+out PDF link annotation
    • http://amsidisi.xyz/how_to_clean_the_keurig_mini_brewerzdwkn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485172/normal_5fcce3ecedb0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443821/normal_60471f2291700.pdfIn PDF document text
    • http://instapriz.website/10806012717say7m.pdfIn PDF document text
    • http://sandwichhq.club/77520136023goy97.pdfIn PDF document text
    • http://all-host.site/67065311807i10pu.pdfIn PDF document text
    • http://mirror-x.org/engineering_technical_report_format18f9v.pdfIn PDF document text
    • http://ninotekega.mygamesonline.org/champion_9000_w_portable_dual_fuel_generator_reviews.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455645/normal_5fefe11844a64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481069/normal_6052d8d95c16b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409238/normal_60596cbc3929d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410190/normal_601a548c5356e.pdfIn PDF document text
    • http://dreabling.online/gimezubig07bu8.pdfIn PDF document text
    • http://zodelem.mygamesonline.org/80159782414.pdfIn PDF document text
    • http://retys.fun/basketball_court_diagramsf1yr3.pdfIn PDF document text
    • http://wejnpowk.space/best_way_to_listen_to_music_offline_on_iphonew3e3x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419836/normal_5ff29695dc64e.pdfIn PDF document text
    • http://autoupgrade.website/21308228780wxeix.pdfIn PDF document text
    • http://presalle.xyz/7440725231veixc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386613/normal_5ffe2c9fc5f2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500904/normal_6017b207103ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464303/normal_6047a6ddeb531.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lavisekenesavof.myartsonline.com/nedari.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/research_design_in_clinical_psychology_5th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/amritvani_hi_buddhachi.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/sinusoidal_pulse_width_modulation.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/the_castle_of_otranto_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/what_side_is_bank_1_catalytic_converter.pdfIn PDF document text
    • http://limuzer.atwebpages.com/25483635356.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_off00010152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10152 5648 bytes
SHA-256: 3ab7e8a4829e0bf3dd37ee551855b3881369fb35a2d989d5a217519fcb14a732
font_01_sfnt_off0001147e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147E 10432 bytes
SHA-256: 9d59939fa51b14bafb7339ea8cd9be8136813c14fdff1177133c46a59947cbd9