Malicious PDF — malware analysis report

Static analysis result for SHA-256 da92a22f076fec4b…

MALICIOUS

PDF

86.5 KB Created: 2021-06-26 03:20:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6e16a5768f8ff55e8fcf41050c5b8e81 SHA-1: 35fa11116980e6dde36a8c32dd48058c8bcea338 SHA-256: da92a22f076fec4beb944e2a9aea575d08485e9629daab2ac04cc12995a81d2e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms. The primary goal appears to be leading users to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/a0462e97de121a7711d33c37fd34991f/76330638884.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/5eb47c23a477366c3ed2dec8579a362c/12894941018.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/484444eba7cb8df9aa95c22b856da812/gitojuxirotiwibiwazatigap.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a455d09fd56---jimunivusekiripoguxo.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160746cc284403---88824655746.pdf
    • http://amexeuro.com/an3_Uploads/file/ruzopazefifazaw.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160802fa306956---99117526595.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aebf6bf031f---zuronesobavopatopazu.pdf
    • http://ore-processing.ru/d/files/67491811494.pdf
    • http://alexanderkanevskyartgallery.com/clientMedia/file/xumelonoligukoju.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/c98feaa6d225e638999efca1ca348ef8/59410943711.pdf
    • https://altaspin.com/calisma2/files/uploads/golizagu.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/rr7koegv6ahc7um7hmi1jr19sa/79272551682.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/d1650c58231b2e4ae9e81cb1ba243ce4/28581156504.pdf
    • http://karinameal.com/imgdish/files/sozigenanolimotunuxo.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/07131c25b644166bb32dbbc8216f37d2/dokife.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16088dd65a0a13---84539396759.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cf5d5e8c0---25454175635.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075793ea1d37---binipibikagefaposudaz.pdf
    • https://mingyi-lock.com/data/file/userfiles/files/92004359448.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16071afa2d2075---86495693509.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab58c30ba55---garukobupatikadi.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/790de39482b456232d912c8247ebd887/dotuwavabibojigupemikaz.pdf
    • http://tuhs1970.com/clients/a/ac/acc339db084e87cdfae31a76a6c96f1c/File/sifutotimusijupet.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097644501958---kuzarigufobegonizunot.pdf
    • http://broadmoor79.com/clients/864886/File/kamolujoditu.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cf6a7db2cb0---nipibubiselexigabo.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/fjatnsb1ijpp20vtkej1ss7cv4/27210507875.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=wii+shop+theme+piano
    • 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_off0000eecc.bin
cbb61049a7bb21d159737648549323989f827816b711451678aa15d0c9f7ced6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEECC 18020 bytes
font_01_sfnt_off00011e4b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4B 16792 bytes
font_02_sfnt_off00013662.bin
fac6ed511a79ca5e448d5c8b0135519fb285e32975c743a9cf171f70d64ca1e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13662 10364 bytes

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