Malicious PDF — malware analysis report

Static analysis result for SHA-256 02c69f2a8f558889…

MALICIOUS

PDF

81.6 KB Created: 2021-04-11 20:17:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 73c8782a601a8c5208e3eb0e8a771b18 SHA-1: 21e0d5c7fc9fdff15c40226b8439ac203a106a1e SHA-256: 02c69f2a8f558889b9aa86b06fb2c8b14ce368003731ed223cf143dcce21a4e9
146 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely a phishing or malware distribution lure. Although no scripts were extracted, the presence of many external links and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic point towards an attack pattern involving user redirection to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/strik?utm_term=ozeri+scale+walmart PDF link annotation
    • http://rexexepunefa.22web.org/mikisesafuletaf.pdfIn PDF document text
    • http://rabemedexisubis.mygamesonline.org/biology_class_10_book.pdfIn PDF document text
    • http://1green.space/5257476394ucfse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380674/normal_6023ba31932e3.pdfIn PDF document text
    • http://gidilakapajuke.mywebcommunity.org/bteb_job_circular_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466680/normal_60009e6ab0b50.pdfIn PDF document text
    • http://negedibomul.sportsontheweb.net/spy_tec_mini_portable_real_time_gps_tracker_reviews.pdfIn PDF document text
    • http://leaninrzpd.site/imax_dual_power_b6ac_instructions7286p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480408/normal_6047c92265f75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409413/normal_601362601c302.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/69508692804.pdfIn PDF document text
    • http://dametamaseva.22web.org/zifinebifajutodegusorisog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zopefunexot.epizy.com/gelanus.pdfIn PDF document text
    • http://sobogasitizi.epizy.com/69554261832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84d9fca8-b45c-47a2-85f9-8dd96fdc6a15/my_acer_aspire_e_15_laptop_wont_turn_on.pdfIn PDF document text
    • http://pulitisagot.atwebpages.com/medical_certificate_form_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8728dfb-c039-499c-9fb0-0ddaf4de5001/what_is_the_phone_number_for_medicaid_in_pa.pdfIn PDF document text
    • http://pazixurofuni.epizy.com/49148257681.pdfIn PDF document text
    • https://9f2a6cc1-6e15-4467-beaa-57274ca996ed.filesusr.com/ugd/78f4c3_ce247ee827b34b76a9bc583b2bfcbc9c.pdf?index=trueIn PDF document text
    • https://e824aeac-d22a-4b45-bb3c-17051d6ee04f.filesusr.com/ugd/de60da_d40e2cbe75184b069dc5856a1bc18682.pdf?index=trueIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_af64bdf7a4cf477fb4e88362279c7658.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b695ca56-6810-44c6-90f2-4a23f2b0d178/rational_male_book_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8311f067-8b6d-4804-bb21-6fcc32284ae6/38404148892.pdfIn PDF document text
    • https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_19f6d9a3ee2e481c943777ec6ec0185d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9145479-485a-429d-b62a-5f7e5c568ca3/54567075512.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_off00010109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10109 5116 bytes
SHA-256: 2897e252456f149f41807a9a464ef32942bcf1a792546ab9b90688f192eed2e8
font_01_sfnt_off00011273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11273 11428 bytes
SHA-256: ce6ff6c5bd202dfa1d8e5368236ffbc5e4e8be72c5f3242c16b2959a74655ca0

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