Malicious PDF — malware analysis report

Static analysis result for SHA-256 b784c499eb35559f…

MALICIOUS

PDF

62.4 KB Created: 2021-02-21 09:50:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 57bb19216ff8d907f2d2a72044f57c3e SHA-1: eaf185b25c83581263b37edab5e3ab68b4e1ddb3 SHA-256: b784c499eb35559f5e409bda196061d59c81839212968e2b03f9d47c1c195c8c
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/123?utm_term=free+d%2526d+miniatures+3d+printing PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372378/normal_602c2413d9544.pdfIn PDF document text
    • http://xarusogu.22web.org/spelling_bee_worksheets_for_grade_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375361/normal_5ffcde633aae4.pdfIn PDF document text
    • http://edayafar.xyz/is_a_recumbent_bike_good_for_weight_losshto5b.pdfIn PDF document text
    • https://cdn.sqhk.co/nenuguvan/ihd7qVs/screenwise_meter_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477651/normal_6001bbac204e7.pdfIn PDF document text
    • https://zilavexeredora.weebly.com/uploads/1/3/0/8/130874610/wowupewofufemom.pdfIn PDF document text
    • https://motabuwupogofe.weebly.com/uploads/1/3/1/6/131607229/310bff593e78d6.pdfIn PDF document text
    • https://nezasitize.weebly.com/uploads/1/3/5/3/135303973/1ff9eeec07b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453102/normal_6015cc4a7a6a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453334/normal_600947e579b33.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/qjdgdHx/child_care_services_laredo_tx_saunders.pdfIn PDF document text
    • https://jukosixosibi.weebly.com/uploads/1/3/1/8/131871462/3314850.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tagekef.rf.gd/jbl_wireless_headphones_t450bt_manual.pdfIn PDF document text
    • http://bovamiwojilonem.epizy.com/bsc_marksheet.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_off0000ba64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA64 4356 bytes
SHA-256: 88f78c9da58c65c102a62bd6d9cf7699d328c40b728b7487de48f1b206ad849e
font_01_sfnt_off0000c93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93A 10756 bytes
SHA-256: dd6c257ae43194f698ea0d74936b1a14b2bbfcaea14228d23ca3f413e6394851