Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f55313f6e7b272…

MALICIOUS

PDF

88.5 KB Created: 2021-07-05 06:29:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1dda9afba4a71b9b9a9867e6da5d8d5f SHA-1: 04de298fc85fe8179364a545cacf7c6fbfbbb036 SHA-256: 95f55313f6e7b27227ccd323dbbcdb36b598394b76688df58a385b989433d6f4
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to compromised WordPress sites, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable, but the URL structure and heuristic firings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://mygoaltv.com/ipp/images/uploads/files/18189268613.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907065ae1ba---90051264511.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9eded77e5---73561715590.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/ep2h2ttjecea2hlbvmf7q7umpn/54702062900.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/e2acd6df35c0ada9cc24398bbf198dad/pazoxiwavifo.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/56460648779f4e193a489a449f5ec588/52565894405.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e1c621cc6b0---rubexagomodufedefabered.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/d0ce5760966c5815832c80bab11b1441/85798731788.pdf
    • https://allianztc.ro/files/file/14155475801.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/efd410582883ub03m60rncmos7/1963331378.pdf
    • http://www.urbanwaterways.info/files/fozonefibasazuba.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aea2c132aef---10732459087.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/aa5uvadgha9usrmdcjid5ksrh7/98902276314.pdf
    • http://nw-line.ru/generic/uploaded/13058099148.pdf
    • https://cornerstonelaw.eu/userfiles//file/nalivewirukekupameferu.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160c31de38d590---60319439331.pdf
    • http://www.alex-vasilkov.ru/images/wisdom/file/30790582874.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ut31judl34nvh7nqo920qtslc2/57956061725.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b30278626ad---18396242387.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/7f80eed7ea8644b690771852486b831b/53034787303.pdf
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/26532943389.pdf
    • http://vagtteam.dk/userfiles/Files/82429513914.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=sink+stopper+stuck+in+down+position
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f637.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF637 16792 bytes
font_01_sfnt_off00010e4e.bin
baf3838e4227399dad7bf186104e787dd60d2eb58f479182e0b21fdd3f338746
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4E 10652 bytes
font_02_sfnt_off000126db.bin
088d510feea00f9e9a125f1a803033b30a62d5d89ea3314fb49916a0ceec102c
pdf-font-stream PDF embedded font (sfnt) at offset 0x126DB 17800 bytes