Malicious PDF — malware analysis report

Static analysis result for SHA-256 242e2a1ee11a4f0c…

MALICIOUS

PDF

83.8 KB Created: 2021-08-03 15:24:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6a39073e4e3f549c36ea0ed37192a91f SHA-1: aa28603c408221b26cdeec4d998daf8201d89b09 SHA-256: 242e2a1ee11a4f0c98f491a05d99f48cd89bb3313ec5462fc083c9a69fe587b9
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, characteristic of a link farm. The primary function appears to be redirecting users to potentially malicious sites, leveraging techniques common in phishing and SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/6g6dk1m2r3mo5ou1ch5scp95r7/fusudazut.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c657429176---merimofitokujilinugav.pdf
    • http://ural-kip.ru/admin/ckfinder/userfiles/files/zoxivinetizigexizoxakun.pdf
    • http://jhdjt.com/images/upload/File/52242807414.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16071df7e201df---fidujefabuxezojom.pdf
    • http://angelcabrera.com/FCKfiles/file/63891148580.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/tfd1i7e6nrnot13366vi4ug2t3/jifepuf.pdf
    • http://jocoseatee.com/userfiles/files/22458741806.pdf
    • http://sivam.pl/files/file/92517213281.pdf
    • http://dkkarsin.pl/img/upload/files/jafufisuzozi.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be7b2b98c9c---poxepobuwug.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/2f09bdc4fd38b2a2b5300d6ec5889877/senofim.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160ae6351826bd---gevasokovazejizebaka.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a33b5bfbd---81142136847.pdf
    • https://at1-turbo-j3t.com/contents//files/pavegojopixewatukaf.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/lq4cn6nl7nur74siqdgj5qn3nm/27343341930.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160cea7046d013---54317544960.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/dddfcd0a1cc092a202cdc5386321af87/56350698937.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ca8b6d68f---73492109841.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/2fd13gm84gqr162f6s0v88gn10/36953849718.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/45on1am5rt3onkbibpfbsk8cal/kujeferevuvexatowibu.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/egjchnoeu3fn56q54uvep0jtq2/pukoferuvegur.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/7d50887ad521aa744b4fb8f77af2c81b/fewexurozegametu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+to+file+a+missing+person+report+in+tennessee
    • 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_off0000e1dc.bin
895467f7df812f1dfa887be9ae92846543bfeff17c40cacac7480acae9c68cf6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DC 10776 bytes
font_01_sfnt_off0000faa8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA8 16792 bytes
font_02_sfnt_off000112ba.bin
8b584b691d3ce4da271960e9a18910f071a7b93f8dbd0b213a8d646856cc1c01
pdf-font-stream PDF embedded font (sfnt) at offset 0x112BA 17764 bytes