Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea0bb9f18fdd014…

MALICIOUS

PDF

78.7 KB Created: 2021-04-27 22:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 18ddcf5191f6d50508fe4abefdcb91de SHA-1: cc875feaaacbe403c6568e9247fccec39adc5aee SHA-256: cea0bb9f18fdd014c363da967ce615b249a4c1ea25f6738e538372013eb3ae40
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/strik?utm_term=sony+dvp-sr200p+dvd+tray+won%2527t+open PDF link annotation
    • https://cdn.sqhk.co/vojofarakiva/ggegjjh/digital_marketing_manager_resume.pdfIn PDF document text
    • http://kimugifogetami.medianewsonline.com/67777765893.pdfIn PDF document text
    • http://lipenav.mypressonline.com/social_media_addiction.pdfIn PDF document text
    • https://cdn.sqhk.co/ketifoseja/chir2WC/mini_weekender_bag_beis.pdfIn PDF document text
    • https://dotozirijekuzo.weebly.com/uploads/1/3/4/3/134315872/vozavuk-jeresojazugo.pdfIn PDF document text
    • https://bofufawikifof.weebly.com/uploads/1/3/4/2/134235483/duzokena.pdfIn PDF document text
    • http://dakekunagefasak.sportsontheweb.net/xetewumajanawudeji.pdfIn PDF document text
    • https://cdn.sqhk.co/patizuruf/tjbqih3/contactor_wiring_guide_for_3-_phase_motor.pdfIn PDF document text
    • https://cdn.sqhk.co/firumefetev/i8iciji/17052918750.pdfIn PDF document text
    • https://dosabaret.weebly.com/uploads/1/3/4/8/134861273/1aafccc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tafiwepamubov.atwebpages.com/gumivasekud.pdfIn PDF document text
    • http://kegonen.rf.gd/serovarazor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7abcef9a-6829-4d80-8d1c-85ec75a380ca/what_is_the_definition_of_visual_representation.pdfIn PDF document text
    • http://wazuvolixevafo.rf.gd/tokio_marine_insurance_singapore_annual_report.pdfIn PDF document text
    • http://texuvana.rf.gd/54586298104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c485380-cc81-4b27-ae8a-3d98bb6c20eb/hoover_windtunnel_v2_belt_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/348a38c7-a904-4f71-adb3-d81d17a68cc5/what_is_cvo_curriculum_vitae_in_tabular_form.pdfIn PDF document text
    • http://nadefivetokilak.rf.gd/fitiruzijupepezeb.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_off0000efcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCB 5620 bytes
SHA-256: 6e1fbddbda8a614f2b2c14e48e71e180b24dfea24cf1af0d44bfda50df5bdc96
font_01_sfnt_off00010324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10324 12000 bytes
SHA-256: e043d42ff0a2ea9c0ce6a0811c069319fe311eef3669038d9da42cf9a7677710

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