Malicious PDF — malware analysis report

Static analysis result for SHA-256 703b49c8596847ea…

MALICIOUS

PDF

83.9 KB Created: 2021-07-30 05:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 47df0872704e3684f4f53db53f55c168 SHA-1: b6d152acedb1d62036beb125852f1f1132031584 SHA-256: 703b49c8596847ea51937f4d26d3c768e109041ec9172597a3e86d2c45d387a9
196 Risk Score

Malware Insights

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

This PDF file functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms and serve malicious files. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates that the document likely provides instructions to open a password-protected archive, a common tactic to evade gateway security scanning. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/29260992887535b3eff1f075839066cb/xalotamesusukojezufor.pdf In PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aafaf36bfb---lexedav.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/36649056222.pdfIn PDF document text
    • http://www.grifin.sk/files/91287447973.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/75913698171.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160724bc9b7ed4---78545535461.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/pb9eodqh9o4310d5mi0jiflkml/tijesisukalufonowifuzi.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d829b54e53---74328619718.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/54232887082.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/xobanidirexige.pdfIn PDF document text
    • https://renebeumer.nl/userfiles/file/bumiruxul.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a10b46148ab---lixagewonatirag.pdfIn PDF document text
    • http://954move.com/clients/4890/File/96787388808.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d8b74dac6---81530323342.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/91750252512.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/sifutotiwirab.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/67005240707.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/46203b257f93b654cf16b4c727b260ce/26586858283.pdfIn PDF document text
    • http://jameshamiltondds.com/clients/6/6c/6cc67b5d90347a591bf4e9c0b97a5143/File/seloxis.pdfIn PDF document text
    • http://bdn10.cz/files/file/95133197654.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160befddfe7922---zizosuxuzise.pdfIn PDF document text
    • http://xn----9sbbnbtte4cyg.xn--p1ai/ckfinder/userfiles/files/mufugevopenurudodixexuk.pdfIn PDF document text
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/bumedodiwitedav.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/431c22a574088ae28e10ee3cbe1c5936/65877471567.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/oe50ehhla5hickar3vt1n00dh6/zupogevovofogonexewafumit.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/95f9053bea74deef4d9674f2638e545f/visopetegojipige.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=abbyy+finereader+15+professional+downloadPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE84 10900 bytes
SHA-256: 093e910f6b03f1718b9533d2324fd290aadba70108f65024264702068d546b73
font_01_sfnt_off0000f7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C8 17712 bytes
SHA-256: c4a493ca283338127bd49b064a6f23907ed6be30639b12ad0a84c19a2c41604e
font_02_sfnt_off000125b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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