Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e87c637b6842773…

MALICIOUS

PDF

76.7 KB Created: 2021-04-15 02:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 30c70f9bd130fc43b28fc11b3729a088 SHA-1: 7147b65da7fa16a653b6d526fad10a32990468a4 SHA-256: 6e87c637b6842773f4a14b2c0850a060442a3d5a7600e9d75f255908ebb258bb
146 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. 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 0.9993

Heuristics 6

  • 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.
  • 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://botokaw.ru/strik?utm_term=how+to+pair+panasonic+cordless+phone+to+base PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366993/normal_5ff3a9310c558.pdfIn PDF document text
    • https://cdn.sqhk.co/zugivakizo/hheifig/smash_mouth_concert_coronavirus.pdfIn PDF document text
    • https://cdn.sqhk.co/bofotabi/eKicfgh/unified_products_and_services_franchise_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500677/normal_5ff4c9ec80710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421639/normal_604f08026d623.pdfIn PDF document text
    • http://judizoduti.iblogger.org/l_assimilation_phontique.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383802/normal_6027091a56bf4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467004/normal_5fc648cd7901f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427080/normal_604f266d4ea0c.pdfIn PDF document text
    • https://cdn.sqhk.co/kiribikiv/gchf4ZA/amtrak_routes_from_chicago_to_texas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484609/normal_60250abcb0010.pdfIn PDF document text
    • http://fumuledijir.22web.org/inteligencia_moral_y_calidad_humana.pdfIn PDF document text
    • https://cdn.sqhk.co/kabevapixox/icOjahe/moto_widget_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385206/normal_5ffe7af4101de.pdfIn PDF document text
    • https://cdn.sqhk.co/kofuvufexo/CVgdvgg/skylanders_imaginators_switch_ebay.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459468/normal_6021948daca22.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tepokubomime.rf.gd/susozekifoganesotuvowaxu.pdfIn PDF document text
    • http://bumerezuwo.epizy.com/bukaj.pdfIn PDF document text
    • https://504706c9-3a86-45eb-876a-6494ef133fff.filesusr.com/ugd/80c1db_eef22a3e3209420283c7d7da1480b3bc.pdf?index=trueIn PDF document text
    • http://fibalikirikoti.epizy.com/building_control_ni_application_form.pdfIn PDF document text
    • https://2e8e3215-33bf-4fe1-bc67-b38dac560527.filesusr.com/ugd/269bb8_7ebf3cf7d225422181577f6aea2fc7d9.pdf?index=trueIn PDF document text
    • http://xadezifu.rf.gd/ronco_showtime_rotisserie_5000_parts.pdfIn PDF document text
    • https://a3720f92-bdaa-4449-a3ff-14f36884d2d5.filesusr.com/ugd/afadc3_455e9e54ed454d65a2ae74f3d706f214.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE80 5356 bytes
SHA-256: 47cf285991e888c26e854696e358d3c0d658e15b9f34ee65b04122ee200f3ff1
font_01_sfnt_off000100ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AE 10732 bytes
SHA-256: 1b0b9e5078c4c33098ad33c5b0087b804b2b42b9bfd61d99faf389d844214984

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