Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d00af0f0c15679b…

MALICIOUS

PDF

92.6 KB Created: 2021-07-22 07:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 593f3e3d135f88e9a96ea671a62447d0 SHA-1: d7eca53f82298ab3fd48f96ef138f6b25f434403 SHA-256: 4d00af0f0c15679bed0a7879d2dd3da3af3114c6790e43fd176aabf82d626cdb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS uploads or appear to be disposable. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm on potentially untrustworthy hosting suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://blesk-stroy.ru/userfiles/files/xelebosurokesego.pdf In PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/lqagt31ju8ka8jlrek0nmr82ph/napowamituluxixi.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/3c3209ee4b3293d56e49d43b869cd513/11252824245.pdfIn PDF document text
    • http://cymagun.com/userfiles/52930145178.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/28354024160.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16075a68c94c8c---durefijodoxebafopal.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/l7goemcjt81e6gims65n563ii3/55256509711.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a0c362a9a---36642469992.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/lunasexusawi.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9c231cbfd---ridefunogimowux.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070bc52aeb51---65120519037.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097fa2c320ca---nusinegopirivifiniliperen.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/f6dlalj64mlcbj55l969oap487/gunerixizuril.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/34351726133.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/ce47f5d59ca704b9c40a2649a3a7c4cf/49884505199.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/14064639659.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/2oc709ha5ekb3u76rjhm11371k/48063715090.pdfIn PDF document text
    • http://nissanotogovap.com/uploads/images/files/2021604696.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce4ec438f8---69176735793.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/74641100473.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/10028934651.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/2ee7729230be540bb41612003fdfdb19/39252117678.pdfIn PDF document text
    • http://18554080.com/userfiles/file/rakoxirib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=5+levels+of+affective+domainPDF 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_off00010838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10838 16896 bytes
SHA-256: a1078dd43fe4dd1bdd2579135eb954aabbdbd3cc47382af102a97342c960bd72
font_01_sfnt_off00013494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13494 10640 bytes
SHA-256: 621133eb1a1f3c9e1d0181fd886b57f906036da16a05a02e428b44d44a644d5a
font_02_sfnt_off00014cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.