Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc5dc11e681a68f…

MALICIOUS

PDF

81.8 KB Created: 2021-03-20 07:53:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f693806b2d72a7f183752356dd2514b5 SHA-1: dcbdccc45fd72f0218a600d07bf02fd17c681227 SHA-256: afc5dc11e681a68f2b9095636fed6cd723f2cae8a71ae897d17289b033fc8924
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically highlights the use of link farms on disposable hosting, reinforcing the malicious nature of the document's content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://bologen.ru/wix?keyword=rosalie+jean+willis+charles+manson+jr PDF link annotation
    • http://b0xberry.online/cayenne_gts_manual1106j.pdfIn PDF document text
    • https://komibaxes.weebly.com/uploads/1/3/1/6/131606619/8072658.pdfIn PDF document text
    • http://rmk4sale.xyz/hp_laserjet_1536dnf_mfp_parts_lista6g5k.pdfIn PDF document text
    • http://itanah.space/child_care_benefit_form_centrelink1f7fi.pdfIn PDF document text
    • http://goodnatural.space/xivuvezigcprj0.pdfIn PDF document text
    • https://nalepigetor.weebly.com/uploads/1/3/0/9/130968958/d81f5b0a82e4f.pdfIn PDF document text
    • http://artyom.guru/curso_de_economiak85ur.pdfIn PDF document text
    • http://cmb-accueil.com/dark_souls_3_diminishing_returns28bla.pdfIn PDF document text
    • http://brettlockhart.com/splendora_tx_haunted_drivenwjbc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bugexiwur.epizy.com/raduvizafiwurop.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/jasav.pdfIn PDF document text
    • http://gozuxinub.epizy.com/bomanilefamef.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/harry_potter_book_1_ar_test_answers.pdfIn PDF document text
    • https://7f58a6d3-5723-489e-a2bd-17fd91e1ddd5.filesusr.com/ugd/655495_087b731a1faa4d3082b54b412b577fab.pdf?index=trueIn PDF document text
    • https://cdd249b8-77b1-4a94-b024-8995efe4d959.filesusr.com/ugd/d394ff_e3ea9a7872754de2bd50b070e398514c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/how_to_set_tissot_powermatic_80.pdfIn PDF document text
    • http://fodimezafizuver.epizy.com/ansys_15_tutorial_for_beginners.pdfIn PDF document text
    • https://bd15da75-ee01-4ad3-8b22-4778d9929f37.filesusr.com/ugd/1abc29_fc960919a9b04378a4649bd8591c49b2.pdf?index=trueIn PDF document text
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_52c0092009f9441ab4d925a274ddae6b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fexuror/572773512.pdfIn PDF document text
    • http://renirujetumofid.epizy.com/96306253126.pdfIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_764656f7124548868c2ec3c626263cf6.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D0 4924 bytes
SHA-256: 70a09a4e78a6f20d097cb0f24817d48022e2d0e71d71260c464c17982bf0ec5f
font_01_sfnt_off0001065e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065E 11424 bytes
SHA-256: 8716c8d9fad4f6f21c668432ee0b0887b8f887c0627a7fc446d08b799a795b0b
font_02_sfnt_off00012ba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA9 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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