Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e1eca21a9a08d3…

MALICIOUS

PDF

79.6 KB Created: 2021-09-03 18:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c6b662fa395be98610afcb502619efba SHA-1: c7470eaea502d66dae11c82f951a79651d6db77b SHA-256: 60e1eca21a9a08d34f8b7da94ac5cd03e18190e30798d1de90f612d9bb715929
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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 http://www.majbrno.cz/uploads/files/jegutaretureravupavit.pdf In PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/b2a14aab68bb24e5cef822e4f6d4eb64/nalopeta.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/161303d240ae16---xukemuxugalepasezofo.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/6qloqcvps7dmkttf4cbgr9obi3/4094212725.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/poturumetadan.pdfIn PDF document text
    • http://smwiarus.pl/ckfinder/userfiles/files/9592564813.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16098996a312a1---65434426926.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/sixejepalozi.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/in8pr30r05npq7voobuo0pd82c/lotobi.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/d81495f855e9358f2322212790104977/jufoxubazifomi.pdfIn PDF document text
    • http://www.blueoak.fr/image/file/36502589810.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf164a83e0---pafowowofajovefariruwubux.pdfIn PDF document text
    • https://www.jancsoalapitvany.hu/ckfinder/userfiles/files/firenebebunodog.pdfIn PDF document text
    • http://lhs60to70.com/clients/3/32/32806278e47d7e4d905c37b1d6ebf04a/File/nizipojarugajogekoroteno.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf09c7b83b6---66352043286.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb59de1dae---feratenubilonik.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/45519213513.pdfIn PDF document text
    • https://tonitomov.com/picture/file/111669259.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/b6671cbe745600480632bdffcf1ef59b/nulodepiba.pdfIn PDF document text
    • http://thuocnam.xyz/images/files/tesimupubevesowewenezu.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/56856790566.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900c78bf66d---bavotunuto.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/19513804940.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/61614910220.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=una+vida+sin+limites+alejandra+llamas+pdf+gratisPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB782 10924 bytes
SHA-256: cc43dd0016b26d63dcbbe04ff9d7228cdf2e44d66784de0e91bf4b8648c84cda
font_01_sfnt_off0000d082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD082 17828 bytes
SHA-256: e27f3d0978532d6d9f93c6d37f8d1e314e6abae0d9a9851603ab1571a241dfe6
font_02_sfnt_off0000fde5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE5 17368 bytes
SHA-256: 5996f4afbea1b043ef4685a57dd0a9029f18c8ccc29f39c7d7ce8a0f797a42af
font_03_sfnt_off000117ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1