Malicious PDF — malware analysis report

Static analysis result for SHA-256 c71e64093ff22ebe…

MALICIOUS

PDF

93.6 KB Created: 2021-04-28 23:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 883de649e9ead3cfdc28b24c347da19e SHA-1: 51528e387460eb3545fc5a447e0686df5178bbb1 SHA-256: c71e64093ff22ebe3b97cc48aecc9e3c35987594cb1e1b1274988837a2826282
146 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm or phishing campaign. The 'SE_CALLBACK_LURE' heuristic suggests the document may be designed to trick users into calling a fraudulent support number. While no scripts were explicitly extracted, the presence of external URIs and the overall structure indicate a malicious intent to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://leonvi.ru/strik?utm_term=how+do+i+add+netflix+to+my+dish+hopper PDF link annotation
    • http://bcpzonasegurape2-viabcp.com/social_contract_definition_ap_govymkgw.pdfIn PDF document text
    • http://jovefupe.mywebcommunity.org/crazy_love_lyrics_pepper.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/yaesu_ft_450d.pdfIn PDF document text
    • http://gojovujewinunuj.mygamesonline.org/ejercicios_con_adverbios_en_ingles.pdfIn PDF document text
    • http://idealica-tufficiale.website/ncees_fe_exam_reference_manual2yvsx.pdfIn PDF document text
    • http://pesoxigesu.iblogger.org/41524912864.pdfIn PDF document text
    • http://lapivakop.getenjoyment.net/creative_writing_topics_for_grade_2.pdfIn PDF document text
    • http://taxokijoba.sportsontheweb.net/bacterial_growth_requirements.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/basketball_court_layout.pdfIn PDF document text
    • http://seduvidaw.iblogger.org/pujadavisinowama.pdfIn PDF document text
    • http://defopidofeniku.22web.org/xevitegakunozifo.pdfIn PDF document text
    • http://lakujalinifibo.mypressonline.com/rirufagakasata.pdfIn PDF document text
    • http://rimarilomikozu.medianewsonline.com/37516476306.pdfIn PDF document text
    • http://xafukuxovikovu.22web.org/bachelor_of_business_information_systems_in_canada.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mifedisiso.atwebpages.com/54847891564.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/joint_health_and_safety_committee_guidelines_ontario.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/formation_aide_soignante_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/pakuwiza.pdfIn PDF document text
    • http://gipanigiwulaj.epizy.com/18008477998.pdfIn PDF document text
    • http://rojugukilajix.epizy.com/australian_skin_cancer_information.pdfIn PDF document text
    • http://sanugifop.atwebpages.com/68361663613.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/dividend_payable_on_balance_sheet.pdfIn PDF document text
    • http://tujemagus.epizy.com/wetivaletorefusubija.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_off00012af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF5 5504 bytes
SHA-256: 159ab252e8f6c4fbde470093a7d455e7923a1d34002018e1a979ab0e2bac1d8d
font_01_sfnt_off00013da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DA4 12252 bytes
SHA-256: af92d256a809a95a5db11b8f8f07f9487592b33f46d1759b8d9c31fe17d2c75e

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