Malicious PDF — malware analysis report

Static analysis result for SHA-256 f79248abaab9d84b…

MALICIOUS

PDF

82.7 KB Created: 2021-07-07 16:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 62953a2755f0a685b6e5c599b87d7e84 SHA-1: 96925cc2fb51181109fc55bb65e0b1d5519225b7 SHA-256: f79248abaab9d84b8651abf24dc870a57aa8b943f972f13fc0eed0941252b959
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://wastran.ru/uplcv?utm_term=jurisprudence+mcq+questions+and+answers PDF link annotation
    • http://ateliergermain.net/sites/default/files/file/subaro.pdfIn PDF document text
    • http://www.retorika-zidar.si/ckfinder/ckeditor_uploaded_files/files/97554194203.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/8f1f09ef1370343b9edbc8bcff057b96/vevezoveridipusegow.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082876174541---zilopebafatisosemexapu.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dff787af5f---pifobexepedubipifanejofen.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/vukazidenakatuta.pdfIn PDF document text
    • http://plafondchauffant.fr//img/user/file/28905395754.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607acfd40dfae---fejijesosum.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/nufol.pdfIn PDF document text
    • http://www.emailposte.com/pictures/94988160079.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/gc69392ibua1jb3183gi1a2ie6/13449118301.pdfIn PDF document text
    • http://stonestudio.pl/files/upload/file/65703562161.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/43b62f0683ecb0096aca6bcc4e4779fe/kiragukizugexisuvutekabil.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/84541558410.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/ohlr682jtm2tgqvig7d00e23q7/78813456879.pdfIn PDF document text
    • https://xistenze.com/files/files/sozavogenemamafovefogena.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609eac0d466de---xesanolazizidazapusi.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/2523901fee0d77eedf83a69d43a1bddc/sawuvetolejaxagi.pdfIn PDF document text
    • https://samowar.me/userfiles/files/jijanuw.pdfIn PDF document text
    • https://delphin-bau.com/ckfinder/upload/files/11620655697.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/86bc11823533ef39f72dcad3f2a338f0/91234896354.pdfIn PDF document text
    • http://architettotoma.it/userfiles/files/52800828543.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/5233f37adc110f4817902a6905147b32/lufajalofipudiwutid.pdfIn PDF document text
    • https://123natura.com/stockages/files/6282879897.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE072 10952 bytes
SHA-256: 1453b532b6f3d21c5804357e72bd20052950fa89fab9be6559dbf6f719f5c3e9
font_01_sfnt_off0000f9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AA 16888 bytes
SHA-256: 7d48c023a76e68500248bd4df32003e7d364e74bb7a30acf5445b36cec0a6ab5
font_02_sfnt_off00012556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12556 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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