Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6ee14d2522b343…

MALICIOUS

PDF

85.2 KB Created: 2021-06-28 06:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7c66480832daa30c53dd37cced48c13f SHA-1: e3b82e93e81b35fa739de34f3a4f8b05d1a982da SHA-256: eb6ee14d2522b3430a42af74efa7f61a15dfb3f1b0a30431a62691763ef6828e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely intended to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://catamma.ru/uplcv?utm_term=best+lobsters+in+the+world
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/7ae8c5fea6f5528447634245ea80e2e3/veziziba.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6cee8105e03c96e0d1ce14e6e400012c/89465361905.pdf
    • https://clubesolbra.com/uploads/files/95019163715.pdf
    • https://arte-salon.ru/upload_picture/bokavupefepibixajevanis.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/066e5720a380a497f1a25922b03111b5/luvirolujatizasi.pdf
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/gp3srggvuvc2ckrqu501kth9m0/jeremoluguzex.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/3m69iu63qe05kksh1dhv99ibvg/22375831347.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900f54579b3---delujomebejudozafaxebovi.pdf
    • http://assushop.com/userfiles/assushop.com/file/kibajas.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/uqbk0nss56cpv7r5vbj4gop045/31354209207.pdf
    • https://aluminiosarla.com/userfiles_arla/files/gisuzafuximezikosemosufaf.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/nhs2toslsflh2e5mj96j9s7md5/7231242089.pdf
    • http://budohurtsa.pl/userfiles/file/begabimafamor.pdf
    • https://alakharia.com/public_html/userfiles/file/wadiguzeve.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/3cc0f42f3a9e946aff3a8c2a0ddc2c3b/29681792154.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079588eca4c6---13316030445.pdf
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/d630288aebdda8374e05830bbd79665b/jokofudubudedobom.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160800499568a4---judiwodimu.pdf
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/e4bq26kd3lphhc008b458g71d9/20820739391.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee964ca05b---kumizi.pdf
    • http://biancoacolori.it/userfiles/files/62600366952.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f6ddefcbd---xubazozavedato.pdf
    • https://giolog.biz/images/bulk_images/files/91551613094.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b39c599edc2---suzilot.pdf
    • 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_off0000ed43.bin
01a06813edfa3d1149d35d12e1f952f629ea60e39437f88eed5ae6aeaf244f75
pdf-font-stream PDF embedded font (sfnt) at offset 0xED43 10460 bytes
font_01_sfnt_off000104f3.bin
d8d3a5de2c203c99d9dddf99e15920d18806df25d07c4f5c40cb012c1b02d203
pdf-font-stream PDF embedded font (sfnt) at offset 0x104F3 16540 bytes
font_02_sfnt_off00012f8b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F8B 16792 bytes