Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea2a1605e0b7a80…

MALICIOUS

PDF

77.1 KB Created: 2021-03-18 12:03:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: ad745f0b4bcca7c623ad0a3c034619fd SHA-1: a5cb19a2bebf5974c805766a6212bd0ff28213f1 SHA-256: cea2a1605e0b7a80854320aff0482016728d4c92442df9dbb92506e413eab141
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to malicious or spam-related content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation 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://botokaw.ru/award?keyword=exclusive+authority+to+sell+pdf PDF link annotation
    • http://bamirajewenexo.medianewsonline.com/31222713986.pdfIn PDF document text
    • https://zunodeni.weebly.com/uploads/1/3/1/0/131070331/3106268.pdfIn PDF document text
    • http://mowogaw.mypressonline.com/limejuderitivojomet.pdfIn PDF document text
    • http://fejekadiwoxobiz.getenjoyment.net/ispe_good_practice_guide_cold_chain_management.pdfIn PDF document text
    • https://lorebanoga.weebly.com/uploads/1/3/0/7/130738704/c901bf19a8d48c5.pdfIn PDF document text
    • http://fumuroruzej.medianewsonline.com/81159756959.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/rowosuwuxorexo.pdfIn PDF document text
    • http://pugorot.mygamesonline.org/viratemetilo.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/who_supported_johnsons_reconstruction_plan.pdfIn PDF document text
    • http://waranijovuv.sportsontheweb.net/dungeons_and_dragons_online_board_game_free.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/cbadf833-2eb6-46cf-b411-1d684394c330/jefoboz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c9b7e30-3be3-4883-ae92-e016c63a8518/how_fast_do_airbags_deploy_in_km.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3787f81f-963a-4f1d-96da-aa2ca2e93a3d/casio_5146_setting_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5137f95-bdfc-4881-a72f-294a8beec48d/wijumuwifilivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d1b17a9-fb1d-4ee2-8abb-bd4644675c94/zadiwelatagifubobipefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b740395-7804-4a4b-a43f-2a0c91e33d09/2039891358.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ad62019-389d-41e4-81ae-e248d3daf73a/garuda_purana_punishments_in_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfd9320d-71ad-4f1f-91bd-3917a520f78b/91502343156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6509d8c2-f872-4c0d-8e04-c3be55b9398f/4233325227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9906b9f2-f4a4-4d5d-8dd3-f0e48e283299/turagarozijenufib.pdfIn PDF document text
    • http://jonesojawu.myartsonline.com/lixesewujuzirikigixogolox.pdfIn PDF document text
    • http://pitigapevede.onlinewebshop.net/gunatu.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_off0000f04c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04C 5432 bytes
SHA-256: 9d073069b25066c126c3e840459feef515550aafaffe5e7395f724e87c625f61
font_01_sfnt_off000102d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D9 10684 bytes
SHA-256: 208684987554c3f7e3c6c84f843b34147a397d7c37a43ed665e431a638c6cb42