Malicious PDF — malware analysis report

Static analysis result for SHA-256 46f6232f3e628418…

MALICIOUS

PDF

80.6 KB Created: 2021-03-08 19:17:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f56ec35c009de9c81d541ad89a4d41b7 SHA-1: b4d479f4a62273babfba2a862acbf0af86795b67 SHA-256: 46f6232f3e628418f5738ab84c985d73005dda1ddc97472685849fe9760f8110
126 Risk Score

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 0.9992

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://soxebez.ru/strik?utm_term=what+are+the+skills+required+for+quality+analyst PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367311/normal_601e97e1405c3.pdfIn PDF document text
    • https://cdn.sqhk.co/zapimafe/hiuhchj/64479708742.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477162/normal_603123678838c.pdfIn PDF document text
    • http://kujunat.medianewsonline.com/63123424592.pdfIn PDF document text
    • https://cdn.sqhk.co/jenuluvonuz/aiaidjj/zedasowaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496602/normal_5feb61a3458a5.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzufoxo/tgdibvd/86510649583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448096/normal_5fe90d65c6e98.pdfIn PDF document text
    • https://cdn.sqhk.co/fakujodi/exc1jeq/drag_racing_wheels_5x112.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/stevie_wonder_journey_through_the_secret_life_of_plants_album.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/KBQAwhd/super_spider_hero_run_endless_adventures.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489732/normal_5ffc1cd28bf37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454277/normal_60149130db9c8.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/tudajigo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503874/normal_5ffd66580ef81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475866/normal_5ff5ef0dd9422.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
    • https://uploads.strikinglycdn.com/files/0991a1be-60fe-4909-b85c-43aec1c33090/danby_ac_window_unit_8000_btu.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/83259314457.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/yharon_boss_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5adfdb7-3560-4a0f-959f-74fe91ae88ec/define_verbal_communication_skills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9669e27c-d83f-4e90-88a0-9b2dc69df264/4508146419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b40e9b72-7cd1-4d90-b9c0-589c011d5673/36954393729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a558ca1-4127-4a75-86ab-6c23240e2d72/hayward_pool_heater_error_codes_bd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B4 5180 bytes
SHA-256: aea11c3aa8164a060b2453bd37f0b29cf1ed658a59999272a11ec177b022e6ca
font_01_sfnt_off00010253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10253 10664 bytes
SHA-256: 7b67e1f000d7a107c0f306f6fa63facca964490156b6cdfbde5db64f82d7bcbe
font_02_sfnt_off000126a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A1 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2