Malicious PDF — malware analysis report

Static analysis result for SHA-256 e96efb445fc19ff2…

MALICIOUS

PDF

83.5 KB Created: 2021-03-16 04:41:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: db3169089fcf4352c9f5ea83332371fe SHA-1: 213d2ca1a977ad5eb2b98e433eb0e911d3f72c1c SHA-256: e96efb445fc19ff2ad2ca2426798b4f016901bf3c77a1c3c05c7ca920b23b7c9
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains multiple embedded URLs, with one specifically identified as a payment redirection lure. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests the document's purpose is to trick users into believing there are new or changed bank instructions, a common tactic in business email compromise. The ML classifier and ClamAV detection further confirm its malicious nature, likely involving exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://fokemale.ru/strik?utm_term=how+to+use+sap+software+for+beginners PDF link annotation
    • https://cdn.sqhk.co/gedugari/giiGsgh/bvg_plan_berlin.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/edicjak/royal_family_news_uk.pdfIn PDF document text
    • http://masito.space/89132693414rkbqp.pdfIn PDF document text
    • http://ulekschool.online/85232099104ec5i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8829d98-5f62-4236-8d5f-fc04cc67d57b/marapape.pdfIn PDF document text
    • http://jobisazukom.rf.gd/cartesian_coordinate_robot.pdfIn PDF document text
    • http://kopevevax.rf.gd/36497875510.pdfIn PDF document text
    • https://fecd0c08-032d-4b8b-b26c-6108aca7a00f.filesusr.com/ugd/a87c8b_d60f39cb14be4b978c32e68e10afa78e.pdf?index=trueIn PDF document text
    • https://7f1d4f38-7308-4051-b389-b8ed31312188.filesusr.com/ugd/e948c1_579270a0157d40e7bdd8c0b4fb3d9501.pdf?index=trueIn PDF document text
    • http://datufubizut.rf.gd/98407342106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f6efe34-65fb-469a-ae3a-3849b02f527a/vatujuletijanax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14d36fcf-e139-43e7-bd29-13e4ad081fef/xarari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2981a9ae-e10a-4ac3-8e09-5f6de753f3de/how_to_tell_when_my_remington_700_was_made.pdfIn PDF document text
    • https://df4002df-ed14-466c-b758-10ced248c840.filesusr.com/ugd/3b03e6_2b76104912ba415d9fcd0b5943b5c503.pdf?index=trueIn PDF document text
    • http://sejekaxupoze.epizy.com/moh_moh_ke_dhaage_song_male.pdfIn PDF document text
    • https://46a1ac71-481d-4a85-b709-d40f3a189542.filesusr.com/ugd/143c98_2e2f663ad0744627b0c9073d3b380690.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/74ee923c-e1e4-440f-beed-65b6248bdfb2/1572209595.pdfIn PDF document text
    • https://e0bfa911-60eb-4c53-bd8d-ceec25156dfb.filesusr.com/ugd/0a052f_b8a9dfad24c8422eb666c8e0c3de1f61.pdf?index=trueIn PDF document text
    • http://peworesafasar.epizy.com/catalogue_toto_2020.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_off00010b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6A 5232 bytes
SHA-256: e1bc3545f4ef9a072b03b4f1f25159b4420df59f25f97224274720abf83bf7ea
font_01_sfnt_off00011d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D57 10452 bytes
SHA-256: 53ff420fcc565a3e841108b48b5460d89bfb314ed4838c047b5b39469a16fd6a

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