Malicious PDF — malware analysis report

Static analysis result for SHA-256 4abb323e68096b49…

MALICIOUS

PDF

80.1 KB Created: 2021-09-05 22:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 86d034f0d9654e10d3ad957e5db184fa SHA-1: 2ab39125c2cf67ffad3bcdac0b2f4735a80a10e9 SHA-256: 4abb323e68096b492afb41468a48f973ccb0e1756e798170d9fa87529e5f5dc7
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous links pointing to compromised CMS uploads and disposable hosting domains. The embedded URLs, while some are benign, are part of a larger pattern of directing users to potentially malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://dooroc.com/tk/upload/file/70668090286.pdf In PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c4aa4b0ab---giveputigu.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/402e0f1542984160c423e3f083aa2b61/25155795363.pdfIn PDF document text
    • http://cke.hk/userfiles/76731776228.pdfIn PDF document text
    • http://vietthanhstone.com/images/news/file/kivoza.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/uubihgqo820rjnnk0bklloom74/xamejuviniwo.pdfIn PDF document text
    • http://kruengrangthai.com/files/files/96167127133.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d4028834339---vunikuxewawelurolij.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/zusedin.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/0c2b99d6b80a2fda4fb7459a32410787/fatibuvibom.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/popinoxusotudumexodivanov.pdfIn PDF document text
    • http://suriyedostlukdernegi.org/image/files/vulijemexazat.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d618eb87e20---70396408725.pdfIn PDF document text
    • http://ekotronic.eu/files/file/palimexegigukale.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/63992051607.pdfIn PDF document text
    • http://santeh.md/img/files/61006197460.pdfIn PDF document text
    • http://18554080.com/userfiles/file/xumidataju.pdfIn PDF document text
    • https://studioconcept-stand.com/fck_userfiles/file/5719946145.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/gijomafazedemujupo.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/d2c75bd515a21d705d412a03c303d36d/86413297941.pdfIn PDF document text
    • http://blueyee.com/upload/file/011149031208.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/245f4vjiclhhkuo9gmeak9m08s/zunegog.pdfIn PDF document text
    • https://tisuputih.com/contents/files/susetupemavukivodo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=finding+hypotenuse+of+a+right+triangle+worksheetPDF 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_off0000d1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A0 18112 bytes
SHA-256: 7176db328c84ba40b221d8054a21ec6cd90cdc04ca89bd286ed4cf85d358eb8d
font_01_sfnt_off000100a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A4 11144 bytes
SHA-256: 63bf3c4eb826e9de6d74b8d89732e5ff240ed459b12492deec4fdfc4a8a30784
font_02_sfnt_off00011a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.