Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba0fd0cc80cb8f1…

MALICIOUS

PDF

70.0 KB Created: 2021-09-26 21:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b6e0f639b70d4f4331b25508c9327afa SHA-1: 35d71e84ddc814515e1c6e0a16e05cc1e2783310 SHA-256: 0ba0fd0cc80cb8f124ec0990d868fd3b3ab84c816890729ea1a9e21595f71b8d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the heuristic 'SE_CALLBACK_LURE' suggest a potential callback phishing or tech-support scam, although the document body is heavily obfuscated and does not provide direct textual lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://okeefesreef.com/ckfinder/userfiles/files/megukapagomazori.pdf In PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/50848726193.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/7504373426.pdfIn PDF document text
    • http://eko-uklid.com/files/file/53880905627.pdfIn PDF document text
    • https://myvideoclasses.com/ci/userfiles/files/79688572316.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613d773d167b8---32471372958.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/09/03/file/42794897494.pdfIn PDF document text
    • http://sun-tes.ru/files/file/54167694228.pdfIn PDF document text
    • http://mobil-tech.com/files/dutumatimiwaworurat.pdfIn PDF document text
    • https://408of53crownstreet.com/assets/media/files/15803178555.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e302e2a14c---37683464456.pdfIn PDF document text
    • http://myatkinsonfamily.com/userimages/kodal.pdfIn PDF document text
    • https://home-consult.lu/userfiles/files/31924703246.pdfIn PDF document text
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/boweduvovofiperisisemo.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614bb299a3159---74563724148.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/161465276a0338---60741767871.pdfIn PDF document text
    • https://studioconcept-stand.com/fck_userfiles/file/zazuvipuxa.pdfIn PDF document text
    • http://kawoka.com/userfiles/file/38395097197.pdfIn PDF document text
    • http://abwhopewell.com/uploads/files/77097320024.pdfIn PDF document text
    • http://www.farimar.pt/imgs/uploads/37953614163.pdfIn PDF document text
    • http://diakmelo.hu/ckfinder/userfiles/files/goziziwid.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612eaa803978d---70861634719.pdfIn PDF document text
    • http://elitvorota.ru/f/file/zuduxoreku.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/ml82l7b71e11v2lcvmlrn899nk/vesodogiwebixuwulodugo.pdfIn PDF document text
    • http://konberdbio.com/upload/files/88134847160.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50810664779.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=hello+kitty+theme+androidPDF link annotation
    • 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_off0000b5d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5D8 10544 bytes
SHA-256: c2124792f888839a5ebb03474d58a8cfe13dbb0d8f743642c003d42ec416475d
font_01_sfnt_off0000cd9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AF 14596 bytes
SHA-256: 1f81cc98a03b61e9b9a9893115c14d5da8a6eab1bf2c42bf5a55196e103005da

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