Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b5439f32a28b862…

MALICIOUS

PDF

78.4 KB Created: 2021-09-19 05:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b12e98d95b3a398e3c74b4559b5a6bb2 SHA-1: f6abf833a5c24ad46d9c219062d0772e1c002321 SHA-256: 9b5439f32a28b8628baf5d8c80c6dae2f0a72120967faec6d358a3b9ade9de35
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a credential phishing lure. The document contains numerous embedded URLs pointing to potentially malicious domains, suggesting an attempt to redirect the user to a phishing site. The heuristic 'SE_MFA_LURE' indicates the document is designed to harvest one-time codes or MFA confirmations, a common tactic for stealing session tokens.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://queure.ru/uplcv?utm_term=123+movies+app+free+movies
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/1ff1428ff1dc0c45bf7af21d114416b5/wofinaxumazutuxe.pdf
    • https://dorfadvertising.com/ckfinder/userfiles/files/36852297082.pdf
    • https://heatingboiler.ca/fck_upload/file/51416851816.pdf
    • http://eko-uklid.com/files/file/fiwaxajexunuleva.pdf
    • http://german-ex.com/images/blog/file/82823912419.pdf
    • http://dj-maily.com/uploads/pages/files/gikiwubuvezarifelup.pdf
    • http://gulfcoastlist.com/userfiles/file/labuzi.pdf
    • https://mr-alian.com/upload/ckfinder/files/vomixot.pdf
    • http://www.mousumibanerjee.com/fckimages/file/3138094688.pdf
    • http://sbriz.ru/userfiles/file/xizavegigedidawugofun.pdf
    • https://relans-nn.ru/images/docs/file/48154063380.pdf
    • http://fcraregistration.com/UploadedData/file/78180952702.pdf
    • https://tatvan.in/userfiles/file/41005073956.pdf
    • https://ashasuchikala.com/ckfinder/userfiles/files/gaxodesozi.pdf
    • http://aktifithalat.com/resimlerfiles/29416503824.pdf
    • http://orosweb.hu/ckfinder/userfiles/files/dejogafivotatizovola.pdf
    • https://people11people.gr/uploads/File/borunixisamiwude.pdf
    • http://zenithmetals.com/files/82776765307.pdf
    • http://csc010.com/userfiles/file/20210910171922_l10496.pdf
    • https://vivekanandbawwa.com/userfiles/file/warokawawezu.pdf
    • https://hoanghaie.com/Images_upload/files/tobenezagifavalav.pdf
    • https://pieseautocomenzi.ro/userfiles/file/judalumukijurolok.pdf
    • https://aep-tc.com/cache/fck_files/file/musedutasogabuwudasifawo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdbc.bin
2e37293166938adf287efaa6ce615d8cd389a05cc21b629f5b928184fbda3f3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBC 17792 bytes
font_01_sfnt_off0000fb91.bin
eefbac9eb8ac0664bfdb454cdf30d5c0ede64e355d8ee490b1f4937cc3eeb929		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB91 10584 bytes
font_02_sfnt_off000113d5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113D5 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.