Malicious PDF — malware analysis report

Static analysis result for SHA-256 be229b2ab8c26947…

MALICIOUS

PDF

84.9 KB Created: 2021-09-06 11:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 22f89cbd71198556187ab5a105a786ef SHA-1: a25a696242985c519d12e45fef7ccb51a99059b2 SHA-256: be229b2ab8c26947be4690f058f90864fa9597887e9e80f28a450e823d09a8c0
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, so the primary attack vector appears to be social engineering via link redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://gamepinleri.com/calisma2/files/uploads/87982658595.pdf In PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/zuvew.pdfIn PDF document text
    • http://langmypham.com/luutru/files/38037621916.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d17ef38db---42883769225.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/62688073229.pdfIn PDF document text
    • http://m4klynchburg.org/clients/3/34/34420611de4c9c7593cf5e5fe12de6df/File/rofojijajobesu.pdfIn PDF document text
    • http://www.recko.ru/ckfinder/userfiles/files/lipilakadigolokozodav.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/jakegexibej.pdfIn PDF document text
    • https://www.displaysdirectaustralia.com.au/application/third_party/ckfinder/userfiles/files/55251916145.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/lapebiverozofiwi.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b911f59366---21682365636.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/53837355444.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/f2a54a3d150cd44630e26ce1bf7de905/damenuludowe.pdfIn PDF document text
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/75141772174.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/4iv7v0ia1lq4vvdskgihmjt7i2/nuxagiresavedinuruzepun.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/nudef.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/kamifanafiv.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/90470867253.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/79126737840.pdfIn PDF document text
    • http://yilip.net/userData/board/file/bikewezosubil.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a683a19b2---4631638455.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/174imcpqldrgha2hi80a0js7d5/43868314449.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=control+systems+tutorialspoint+pdfPDF 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_off0000e83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83B 10904 bytes
SHA-256: bbe9df19d940b01199dead65d8339a519fcea19fd3d0c62022c8d10addfa4931
font_01_sfnt_off0001017d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017D 17196 bytes
SHA-256: 5eb7876104e15eb3e69bad07349cba85cc33342d3411a4377fd6213cbeefbbf7
font_02_sfnt_off00012dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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