Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e011152b8c5998c…

MALICIOUS

PDF

81.9 KB Created: 2021-09-08 07:37:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 104cc4cd87a9f50902ae0feb3c746237 SHA-1: 28dd494db07ce91bb7b03805ebf1168742d094bd SHA-256: 6e011152b8c5998cc137334d9f33efa9dee72ba53841892745d6de41d922c23d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to other PDFs hosted on compromised websites or disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The primary attack pattern involves directing users to external resources, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • 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://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a6719be83---52796217942.pdf In PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/3v9phv3hsqdm23gv4les8db835/86909475046.pdfIn PDF document text
    • http://pumarecovery.com/userfiles/files/limefakam.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/bowibupaxisivoramaratopa.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16136036935362---67413886541.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/71086708889.pdfIn PDF document text
    • http://studiomontironi.eu/userfiles/files/10604341750.pdfIn PDF document text
    • http://billsky.ee/files/file/nalugujobupepuraluxizijuz.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1611df01264526---69697746154.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/7i9eoenvkmb69hn6u45hr1puir/nelitijukerawasuz.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/vavaxarenepeliwe.pdfIn PDF document text
    • http://agrostroi-proekt.ru/ckfinder/userfiles/files/lubet.pdfIn PDF document text
    • https://basisnomor.com/contents//files/32182494512.pdfIn PDF document text
    • http://santabruna.cl/upload/file/musedob.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/87794219562.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/684ba5ec5b57881a96a8a3c853c97668/mekawo.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/83223843299.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/batofamevasesesuxivo.pdfIn PDF document text
    • https://marbellamohali.com/wp-content/plugins/super-forms/uploads/php/files/33bfeb95fc220fe1174cf832b1130341/jomowi.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/0e2d7b669ffa8c9d6843b5c86f54385f/pebotigaxofola.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/mefikelodizoxopa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=pennzoil+synchromesh+manual+transmission+fluid+autozonePDF 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

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_off0000da46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA46 17780 bytes
SHA-256: a5dc62dbd7fffc787c19f08b3409fb6372f39b4a2f1aa691c6be399d8034db12
font_01_sfnt_off00010852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10852 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12069 11016 bytes
SHA-256: 4de9bbd4ed2250edb0a2e870422a5b26701a12fc364060bbfe4916928efbf16a

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