Malicious PDF — malware analysis report

Static analysis result for SHA-256 d354af7f64866c9f…

MALICIOUS

PDF

84.1 KB Created: 2021-06-30 20:25:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: c64ab714614bc9710efd970cc5b99fd1 SHA-1: 97d1bb0eba48ec466786712a8b44e54504f88f34 SHA-256: d354af7f64866c9f92b32d273a7114787957ed6afc16b63e5ddc68a58bd17328
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites and a visual download button, indicating a likely attempt to trick users into downloading further malicious content. The presence of multiple external URIs and link farms suggests a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://irlanc.ru/uplcv?utm_term=example+of+closing+statement+in+disciplinary+hearing PDF link annotation
    • https://majorsagilekvaros.hu/uploads/file/76515030772.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/14125205946.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/0b461818e1f9c9633f523ea98d44640e/67422326931.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/86897032144.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/fonujodixawokolebinubosok.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/kfc7vuvc9lgrdvf0thh19pc612/lixoxivetogawo.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608339a4b108e---58773384513.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/64946972720.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/medozumimataremitozatinux.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb5a1ef7b1---41613035733.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/71456460555.pdfIn PDF document text
    • http://bendhorseride.com/userfiles/file/jedime.pdfIn PDF document text
    • http://anbao.vn/uploads/userfiles/file/jajasodekowukiluka.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/68d1b7d078137dd4eef94b4840a8e7af/dolisorofoloborewe.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b8facfc2e---vorodanivaboleduworede.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1be0216d54---gixikadiwaf.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/tidisidabewisetisositexo.pdfIn PDF document text
    • http://www.retorika-zidar.si/ckfinder/ckeditor_uploaded_files/files/29867968142.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/601ccee1d4459c3956e90ebdaaecf694/7483208943.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/joruriwegakazad.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/ma4r5jsnnaf5vpg1dgf56fe4aa/34065290712.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/71511210638.pdfIn PDF document text
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/31528288855.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/4c40566578cd8047016169b6a7f5da71/gowos.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/mividaredasigitud.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_off0000e261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE261 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA78 11264 bytes
SHA-256: 6e027827be1a409010df010942946bd4a2a3ad560886f7fa0ecc758fea1a1dac
font_02_sfnt_off00011485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11485 17048 bytes
SHA-256: a7770b568511007d292f4b332351e66a924ee975c349efc37b6799472550022d