Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5047a59dcd9267…

MALICIOUS

PDF

73.8 KB Created: 2021-09-06 12:26:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 341fc834fc93067d992516429618fd75 SHA-1: d442f131720eee4c8a22a9fdff4f051e11cc0df4 SHA-256: 0d5047a59dcd9267f446393714bb89011cef081c2aabdb78ce071dac7fb67286
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://mrbossamktown.com/uploads/files/rugibim.pdf
    • http://alemotta.com/resources/original/file/16753959176.pdf
    • http://mebelhotel.ru/userfiles/files/tixefanonikurazitudu.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aecef75980c---nizukigogipixubimarex.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/l8lud4f74bg9ns89nnhmie87l4/jivazudazanite.pdf
    • http://goldenagegroup.vip/userfiles/file/34685212633.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/ftjcvihhqm0ms8a5on1l4h59dt/nefoxolikufemal.pdf
    • http://maivietnamesecotati.com/uploads/files/barodekezum.pdf
    • https://rowadalbyt.com/userfiles/files/fufetiderefubafiw.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/f16bf4983e71044b2a7235d072c5b40e/dukilobudusub.pdf
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/54048701094.pdf
    • http://ohana1bbq.com/uploads/files/dalanixexuji.pdf
    • https://allcreaturesinc.com/files/files/dewujutukalodubar.pdf
    • http://infinity-pro.ru/userfiles/file/33305861067.pdf
    • http://johnsonsdynastyincfamilyassociation.com/clients/10108/File/wubukozofalowigo.pdf
    • http://cateringkieuan.com/uploads/userfiles/file/makasexuwexo.pdf
    • http://driver-jazda.pl/upload/file/pemajetesukurun.pdf
    • http://schnauzermountainminiatures.com/clients/17729/File/kozukifiputizepufakimem.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/b99521bceabf97ed53cdfadc0294fcc2/luvixuwi.pdf
    • https://balajitutorial.com/admin/userfiles/file/remimuxumu.pdf
    • https://harkakotony.hu/UserFiles/file/39740731892.pdf
    • http://digifast.cz/userfiles/gosikobebepobokabedokexet.pdf
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/rvtanu8cn26iroe25elire6u23/48578252244.pdf
    • http://poledance-chrudim.cz/files/file/vidofum.pdf
    • https://alzubidi.com/userfiles/files/78033499803.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=nissan+pathfinder+2018+brochure+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_off0000bdc4.bin
6b00780ff8671d43f9412cf4c828cbd3424671c65c6a52b47c4c556a4bfbfe61
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDC4 11392 bytes
font_01_sfnt_off0000d85f.bin
df42a9275b58d9c32f5e6d9edad4d99d9d780b137e689acacc357b8b493f9a8c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD85F 15856 bytes
font_02_sfnt_off0001010a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1010A 16792 bytes