Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe7cbc9e7494faa…

MALICIOUS

PDF

86.1 KB Created: 2021-06-30 08:26:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 45edb74f252da1a7936513d49c1837c5 SHA-1: 2cfa919022cf8eb858ba179c14291ead8618bd41 SHA-256: 7fe7cbc9e7494faab2942e335cf807ad0ea42b0122ce117bad63b88e4063db7b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, embedding numerous URLs that point to compromised WordPress upload storage and other disposable hosting. The primary goal appears to be directing users to malicious sites, likely for phishing or malware distribution, which aligns with the Spearphishing Attachment technique. No scripts were extracted, but the structure suggests a lure document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16094054f55578---41056654551.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cce7662051---56678033093.pdf
    • http://okuninka-biale.pl/userfiles/file/37281194376.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/d49937aa360e284faa379b7e693de045/devojazejotidano.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079b22fc8b9b---todurukozodopupanirimudet.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f34fce16d8---gigamemuxiluvizawegiz.pdf
    • http://www.zywawiara.pl/pliki/sanonanawedaleluxizim.pdf
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/532023ffdcafeb9e70bbba1c7c69bb4d/tewexovopogafomexe.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160af7e4d5db2c---86288194920.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/a6jto4m8fgii54flm53n4tueg2/wizigifuxiz.pdf
    • http://pospatrans.cz/UserFiles/File/wumavirokubakamimibe.pdf
    • http://alltechsro.cz/files/lubobazafuxefelumuw.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8e1da05ee---zasetekik.pdf
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/027cea425ef716dcc9f363b4f8978db6/57992116092.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/534b08615d381fafa820ef132cb2df00/84251641085.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3192ebd766---77730849907.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1a2280844---nuluwe.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/fauei14bshne9p452va4alkbo1/didipanatebajuzizopagaxav.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609488fedb21e---fimonufomizobegoke.pdf
    • http://mcleod-bobbitt.com/clients/64742/File/wisopupavijafonogejudi.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/d17273703ed39ea6cbce8dad547534d0/xojenuledimedis.pdf
    • https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608006d3bb2a3---10181179079.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16070503aab83c---sipuneramosuvorur.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=free+1000+robux+code
    • 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_off0000f1a9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A9 16792 bytes
font_01_sfnt_off000109bb.bin
46dbddd21765af0aff525ab15ebb165e25eca5b0278cf85f0cbfd977200306ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109BB 16564 bytes
font_02_sfnt_off000134a9.bin
c7180e7c4ab673f1eb9517acdb56b2d2d4d06ddcff0b780197c8e207235a4daf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134A9 10184 bytes

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