Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e670693530928ed…

MALICIOUS

PDF

95.3 KB Created: 2021-07-15 21:41:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a606214b4d0f970b7f24314206b93628 SHA-1: 5a8f4a7f476288f964d528d21146de14d1c589ad SHA-256: 0e670693530928ed9df1d9f3dabe5066ca738cfabbabbddf905d77364a6a14d0
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure and link farm nature are consistent with a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crysiq.ru/uplcv?utm_term=psalm+91+new+king+james+version PDF link annotation
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecbd972157---35024968761.pdfIn PDF document text
    • http://fotossc.pl/_files/file/gudadasut.pdfIn PDF document text
    • https://edinburghpools.com/contents//files/vawusawagenopobakefe.pdfIn PDF document text
    • http://nanoscopy.ru/uploads/files/soronovekepenemitegowugal.pdfIn PDF document text
    • https://cargobull.cz/res/file/57627531130.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c44153625---panagaju.pdfIn PDF document text
    • https://www.twibiotech.com/plugin/ce1/ckfinder/userfiles/files/kagazupogozaweputo.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16075656160516---vukoruzujafonevoxeririgu.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/1407034d7fed25efce856e81fc2f16c4/mufogoxijowoniwarakofa.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/14180797358.pdfIn PDF document text
    • http://sochi-polyana.com/ckfinder/userfiles/files/bozonabedususus.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/c65a865f65fe1d1afab2a3bf68c6bb9e/98904838947.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609aac12b3c4e---jamigiwan.pdfIn PDF document text
    • http://augsburger-dartliga.de/uploads/file/35982321558.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/f18d96c96acd5b5c0e467eafaea475d8/77943900602.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/99v5a4bsm9ha8aighnmde51283/goravalusivojoruvikosi.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/tizonivojapozoduwute.pdfIn PDF document text
    • http://www.ochoadentalcare.com/tacgestorcontenidos_ochoa/documentos/file/In PDF document text
    • http://panziofabian.hu/fck_kepek/14217872697.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/9d4f474fe41ebe5da476c644e341762e/70504768365.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/wiwevijelusenapemufozifos.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d66d5321b7---lipowuvetegufepumexob.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160731768ce9e4---64500085785.pdfIn PDF document text
    • 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_off0000f02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02E 19304 bytes
SHA-256: 338393dbbe41bd2b2de878eaffb1552c179ea830e4a4d821057f745fd2155f2c
font_01_sfnt_off000110d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D6 10948 bytes
SHA-256: dba3aeae46f5292b3d6ed9b75ddf56d750a30601ca79083385c52ba1579a1e81
font_02_sfnt_off00012a46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14258 17676 bytes
SHA-256: a9839441addf5d55d344ac9b9d2f86975aa8cdc6b7eaa71e1dfcbb04e0fba265

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