Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3869fcf80619265…

MALICIOUS

PDF

77.9 KB Created: 2021-09-18 10:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: dba7dfadc47ce42dc714c37bc5428760 SHA-1: d2f01c751257692907bcfabb9261e2f434122eb9 SHA-256: f3869fcf806192654498d6f41d1bdf248948bca2948ff83a6975c9eb674a5055
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics point towards a spearphishing attachment, likely leading users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/uplcv?utm_term=free+live+iptv+apk PDF link annotation
    • http://addisonplaza.abwingsmd.com/uploads/files/xofafosisesukuxebivufogi.pdfIn PDF document text
    • http://pharmabiosolutions.com/filespath/files/20210917095041.pdfIn PDF document text
    • http://www.protectakoteasia.com/ckfinder/userfiles/files/sotekesewezifuboxadozor.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/bofofonufulexagizek.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/19382227337.pdfIn PDF document text
    • http://cmtsport.com/pliki/31342905125.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/fazezebaxubedodowar.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/48364484518.pdfIn PDF document text
    • https://ceylinpin.com/calisma2/files/uploads/6362416574.pdfIn PDF document text
    • https://tahuacoop.com/cms_gpadmin2015/sgi_userfiles/userfiles/files/90590903967.pdfIn PDF document text
    • http://polenes.cl/userfiles/file/tuseluvupivumow.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/senemijonopadewi.pdfIn PDF document text
    • https://agape4u.org/userfiles/file/52243519038.pdfIn PDF document text
    • https://huangs.tw/uploads/files/202109170719108409.pdfIn PDF document text
    • http://safiorida.nl/operatori/userfiles/file/difidawixagosekila.pdfIn PDF document text
    • http://thuocamakong.net/userfiles/image/file/gesokudoxovuvag.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6035b97e9---81080458919.pdfIn PDF document text
    • http://strelnicebudejovice.cz/userfiles/file/jarobebur.pdfIn PDF document text
    • http://screen.by/images/file/rasuvasa.pdfIn PDF document text
    • https://bevasilicones.in/userfiles/file/38461442980.pdfIn PDF document text
    • https://scalper.ir/data/files/file/49533160773.pdfIn PDF document text
    • https://lemonsport.sk/upload/file/zivonudimanemukokot.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/52058755380.pdfIn PDF document text
    • http://sirinthepgroup.com/userfiles/file/xidoku.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_off0000d00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81C 17016 bytes
SHA-256: 0dbfad5635241ba7ded3e01965741ac12bbda254b2d83bd03bd4f0c9ff719144
font_02_sfnt_off000113e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E5 9988 bytes
SHA-256: 98dbd5f06d1884b9028a2de02da4cd0035b439ce234ccc8cc0cacffcacd39f3e

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