Malicious PDF — malware analysis report

Static analysis result for SHA-256 25629400f710f310…

MALICIOUS

PDF

79.2 KB Created: 2021-04-18 21:21:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 57fa954caeeaa093b4a8e032d0078efb SHA-1: 30aace1e8ac81e75a6e12bab4da7402e921476f7 SHA-256: 25629400f710f310bb3dcca9db95ee5c13cb5858db357a4c52b8780936587c53
186 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL appearing to be a search result lure for 'Kenmore elite dryer customer service'. Heuristics indicate the PDF is a link farm on disposable hosting and employs a password-protected archive lure, suggesting it's designed to trick users into downloading further malicious content. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://seumenha.ru/strik?utm_term=kenmore+elite+dryer+customer+service PDF link annotation
    • http://pearhaidhr.fun/how_to_write_a_case_study_analysis_in_apa_format9ut4s.pdfIn PDF document text
    • http://manuximaxemeje.scienceontheweb.net/44728010022.pdfIn PDF document text
    • http://shopsupergood.site/45633658375utsd5.pdfIn PDF document text
    • http://vashastrahovka24.ru/euro_truck_simulator_2_crack_download5xh75.pdfIn PDF document text
    • http://bowuvudofi.scienceontheweb.net/james_corey_caliban_s_war.pdfIn PDF document text
    • http://instup.xyz/donefogavan9omkp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384149/normal_602198bea305d.pdfIn PDF document text
    • http://fartook.online/plan_unico_de_cuentasp545g.pdfIn PDF document text
    • http://strapslap.online/el_nombre_de_jesus_acordes_ingrid_rosariop0y0s.pdfIn PDF document text
    • http://sivesesugipode.scienceontheweb.net/94610278621.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481695/normal_602249638fb0c.pdfIn PDF document text
    • http://hhizmet.com/11546179396b4cir.pdfIn PDF document text
    • http://kunozoxutokusu.mygamesonline.org/what_is_consumer_reports_best_refrigerator.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/bomifabipi/83233207214.pdfIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_ae4bf62aca4f44819118781083aaa2da.pdf?index=trueIn PDF document text
    • https://08b4a39d-fa16-4eaa-91be-ae90003cacb9.filesusr.com/ugd/237bf7_d0f786d41eeb4e93a271aae908f9adee.pdf?index=trueIn PDF document text
    • https://36535336-4f9e-4c0a-b1ad-3385cb5d4299.filesusr.com/ugd/15ebe2_4b0510de46a046a7ba8782f0d9cd40b5.pdf?index=trueIn PDF document text
    • https://bb89c401-41af-40dd-a375-5f792a51f8ec.filesusr.com/ugd/3835dd_39dfd58655604f678909018608ea53b7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legenapi/ace_personal_trainer_manual_5th_edition_audiobook.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/braingle_iq_test_answers.pdfIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_e4b2955402c24c13a7e7301c3c4a83a7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/waduzirader/how_to_terminate_month_to_month_lease.pdfIn PDF document text
    • http://jupegojut.atwebpages.com/56582809023.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_off0000f779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF779 5008 bytes
SHA-256: 65649a1faa6dcbd5ec4cf769165bd5ca993a99ed3abb46ed4ab59c9928712d61
font_01_sfnt_off0001087b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087B 11420 bytes
SHA-256: f300e25fc9800024df4a90a4b9fc733c383ef7299cd7e3463da41a70b37034da