Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07dcd41828cacba…

MALICIOUS

PDF

68.4 KB Created: 2021-09-29 07:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b3a8367987865e06dc213864fce6d4bf SHA-1: 24aa7ab8809e0e9c0321361a923f88cea9486cd2 SHA-256: f07dcd41828cacbaac77fd7e31a52092e47c3b39edc3a698d96c3e04eb67204a
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical of phishing campaigns, which contains numerous links to external domains. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack pattern involves directing users to external URLs, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://irlanc.ru/uplcv?utm_term=metro+pcs+family+plan+for+2 PDF link annotation
    • http://broadviewlibrary.org/uploaded_bvlib/file/32105938293.pdfIn PDF document text
    • https://rajatotogroup2.com/contents/files/suwizujawavoganobokol.pdfIn PDF document text
    • http://av72-reklama.ru/userfiles/file/163061022565314ccd7810fb5ea838.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/82923010874.pdfIn PDF document text
    • https://wonkingchina.com/d/files/virupagopulimikedebelapo.pdfIn PDF document text
    • http://opuspointpartner.com/ckfinder/userfiles/files/32268302893.pdfIn PDF document text
    • http://yuqiaohome.com/uploads/files/202109251313027600.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1614715842d758---7990321647.pdfIn PDF document text
    • https://slotpt2.com/contents/files/kesazozazolekewejovidef.pdfIn PDF document text
    • http://osingenieria.com/images/admin/file/pepofigosewulisaju.pdfIn PDF document text
    • https://atl-50.com/files/file/nolorenetomaluwoja.pdfIn PDF document text
    • https://capitolmodels.tuzonanet.net/userfiles/file/72143149825.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/14388370655.pdfIn PDF document text
    • http://varadimasszazs.hu/uploads/files/12500762746.pdfIn PDF document text
    • https://krygina40.ru/UserFiles/File/zexumim.pdfIn PDF document text
    • http://monteconsultants.com/image/upload/File/67763045716.pdfIn PDF document text
    • https://ita.kru.ac.th/ckfinder/userfiles/files/redexizutepiwirumido.pdfIn PDF document text
    • http://slr-eyewear.com/slr/userfiles/20210927124557.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16149458b2c723---vamakopovisew.pdfIn PDF document text
    • http://transbur.ru/admin/ckfinder/userfiles/files/3255088950.pdfIn PDF document text
    • http://wakesup.org/userfiles/file/joketeluzulagokutoj.pdfIn PDF document text
    • https://edgecs.com/documents/xijunevixipuwopuvegiza.pdfIn PDF document text
    • http://www.accl-calibration.com/login/ckfinder/userfiles/files/kanowebozafulupikorafikub.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE30 14136 bytes
SHA-256: dae01347bf860bb3892edeb62b42095c43c495e6acd45286a17adc7cf5f514bd
font_01_sfnt_off0000d112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD112 10868 bytes
SHA-256: 2bcef0539d222fbd0f9f28eeff815b4f9231b38131608515cffb3baa3dc6541c
font_02_sfnt_off0000ea47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1