Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b215849e2d7e9ff…

MALICIOUS

PDF

88.1 KB Created: 2021-07-04 15:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ee080e222b82b2206087d8c0d6adc6be SHA-1: 5b2d45c8a6a50d1acd810199c5397b094d677f15 SHA-256: 1b215849e2d7e9ffdf7e91435f8c6395a221a37032c2e8ec1c0330b7e8d494fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous external URIs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://nomylo.ru/uplcv?utm_term=liger+compared+to+tiger
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b78368b3bd7---91314633602.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a25abe7ff28---rivagilekapefusuxiduzag.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16092f0cb2984d---medominofizowofaluvesezix.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b933370a043---jidopewizewavagud.pdf
    • http://jp-photo.cz/soubory/files/fadizukikusotimekafowevo.pdf
    • https://floridainvestment.cz/files/file/vewigiga.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ac2465929---sarefelinemajud.pdf
    • https://motelandratecuci.ro/userfiles/file/lafexumubisosikosebofa.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/128b75990d5f7f56e51e11335e653453/sokuf.pdf
    • https://kalyna.ua/sites/default/files/userfiles/file/61414572902.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2c64391e6---90205203196.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc25c4ab916---ponavibugetobojexulafori.pdf
    • http://amphorabeautyclub.com/campannas/file/69856049564.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5c2fe70ef---gugidasedijerovevi.pdf
    • https://aspirans.com/files/file/rekona.pdf
    • https://travelsafeway.com/userfiles/file/xodaximupipepadomobepi.pdf
    • https://careersourceokaloosawalton.com/files/public/garepupilorogiz.pdf
    • http://akcjonariusz.com/UserFiles/file/tufupebokepogobumariwumur.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f90e2ab663---nuxazalukizezotuputof.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4937ef731---1322916930.pdf
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/q60nq9eae3nark48un3mqojeps/fatuxikelegafijawumegefax.pdf
    • https://getracemirates.com/userfiles/files/zugugofunetomadexixora.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160775d9c3c744---36097657754.pdf
    • http://shambala.org
    • 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_off0000ede7.bin
260b4123f6875d395b279026d103aad4576203c3da26ae4f39586370f371cd82
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE7 10496 bytes
font_01_sfnt_off00010592.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10592 16792 bytes
font_02_sfnt_off00011da4.bin
ea28f30b18a5dbfc23a850b87670e7c4a74698066f15bb832b01bcfc0311b4eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA4 19872 bytes