Malicious PDF — malware analysis report

Static analysis result for SHA-256 674568dcccc07ffe…

MALICIOUS

PDF

73.1 KB Created: 2021-09-01 18:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 56838a7192c944840e21d20e988627a2 SHA-1: c82defebcc6e8e2dfebc581e890ee931cde2890c SHA-256: 674568dcccc07ffe16b588cd7c71d9d97d95619493fc1c17320704327cb8b624
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, with the PDF being identified as a phishing trojan. While no scripts were explicitly extracted, the nature of the links and the detection suggest the PDF is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://huntic.ru/uplcv?utm_term=convert+pdf+file+to+microsoft+excel PDF link annotation
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b03f3b7d89a---58524857285.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/7d11a5895784ebf6fa105b20677bc9aa/43597643088.pdfIn PDF document text
    • https://viettrungson.com/media//Files/gojodajukudetirazevisexu.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/55003096541.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/03cbb0f2f059fc8884596f3552809cdc/guwulobonixobemoxex.pdfIn PDF document text
    • https://huaku3c.tw/uploads//files/202108071103226846.pdfIn PDF document text
    • http://kwartetproforma.com/userfiles/file/lidukiwutojapexavo.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/26097137196.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/61447df21c61a2846d4114a8e7b6a809/54353802520.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210820215243.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cc4aaa2ef---loxedoluvadukibilaz.pdfIn PDF document text
    • https://limsurdua.com/contents/files/febizesozobuxanivogoxabo.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/b3a5d1c3c97103cfbec4b3f97f75111e/36625191062.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/40905547138.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607153df3b422---limejokufopixi.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/tezitenolurujejigizibufa.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16121749678eab---jowoxu.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/81278a29e99d998f98b100c291d5794a/xigulepijifeparaxidu.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/56556927518.pdfIn PDF document text
    • http://btfa.tw/upload/files/31751174593.pdfIn PDF document text
    • http://annandale1963.com/clients/69704/File/batizufitaxa.pdfIn PDF document text
    • http://www.instalacionescueto.com/nueva/ckfinder/userfiles/files/nubafifavax.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/12079748529.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_off0000bd07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD07 10820 bytes
SHA-256: fc87836d4767f3b168cd58ee956671c03b3b1a70a1e9ddda9a38cd3edcf9f253
font_01_sfnt_off0000d603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD603 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE15 15832 bytes
SHA-256: d6016025ecb1cc9cef4be362affd0b0cff84aa500a3789949f6dffc749efd298

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