Malicious PDF — malware analysis report

Static analysis result for SHA-256 fabab684f850fa7e…

MALICIOUS

PDF

86.0 KB Created: 2021-07-02 14:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 436ef0f817d3fb2e3564cf577be01b4b SHA-1: eceee842dc0fb82d25d49207c6a5e732635af52d SHA-256: fabab684f850fa7e2e97c8a143f9fb5c3c0493b5e9d737534a5c64637101b50f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS upload directories and disposable hosting, indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://crewmak.ru/uplcv?utm_term=what+does+it+mean+by+ethical+issues PDF link annotation
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/uvro208cu3m0sqtbdb184of9r5/47645226503.pdfIn PDF document text
    • https://sanxuattrucauthangkinh.com/Images_upload/files/rozagixifezojikegejuf.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/lelepizob.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210612055811.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/jodarikifamivideluzusok.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/garebif.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/rivonomifiwidakofaguzalaj.pdfIn PDF document text
    • https://cabsfromheathrow.com/userfiles/file/bifazepuzidelusigafuvafo.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/fajitekaruvejijimusubinej.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa48dce26a---32249433078.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/butiwiromoxujezezalife.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9985f2d998---82660833163.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/0e677961c5ac550d127e9f4506f4e7a7/54871937489.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/nerojowadidisila.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160901a5e917bb---fuxobuvumodixepufekigogox.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b10653168f8---modagixu.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/15854060056.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/89048752773.pdfIn PDF document text
    • http://brownewingfamily.com/clients/a/a4/a4d7a48ed280e719b438ae57db99af5e/File/fefosodaxalekepuziw.pdfIn PDF document text
    • http://distributoram.com/files/file/zogozolalerelikerir.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f371a30fd2---sulobuzezopazatewoneworo.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e5acabb4a---81142133816.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/7debulknti8bof2jf37ot8em3d/migonowulefax.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e801e9f7b9---20921504225.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/8gvk056mnle7crq44e8ukt1296/bexevumorapelati.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DC 10884 bytes
SHA-256: 13fbe0076d9645462ab29e8dba7e58dfa892fc66266b4a363ecce7b70f461148
font_01_sfnt_off00010adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADC 15632 bytes
SHA-256: 8d9042a427474999145f91a4a6453535a7c0c046c815c91eede80b1ca264bf8d
font_02_sfnt_off000132cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1