Malicious PDF — malware analysis report

Static analysis result for SHA-256 4085aaa1e86e1490…

MALICIOUS

PDF

101.5 KB Created: 2021-07-14 07:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 86fb50953e4b4532a88b4c96a9307191 SHA-1: 1ba0dfdb5c8ce6aca0119974083c466331166dd7 SHA-256: 4085aaa1e86e14901fc9f2b292e0486b98e36238133cd2be92533b9f3b0cc3cf
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure as a link farm on disposable or compromised hosting is a common tactic for evading detection and directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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 https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/p0jn3rg70m539g0ngun5pn4rad/boruwoxelodivebemolabomel.pdf In PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/841862a5166cd852ad1cc49917574721/23258617118.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/59320154106.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/4e59992347f9fde259f44c3432b6de57/9712072633.pdfIn PDF document text
    • http://starsunited.at/upload/files/39693167815.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/nirebitimuferegobemi.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607980ee85ed8---16079325176.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/55544408168.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/sagom.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9239e4f8c6---ratijejodobelexaladitak.pdfIn PDF document text
    • http://atomleasing.ru/media/File/nenop.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/zonokanabat.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d4098376855---92875225383.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942cba8c160---20988525958.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/97160034926.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/66099916955.pdfIn PDF document text
    • http://enidbtwcreunion.com/clients/5/52/52e94d62e82ff66504c7d921fc07bf70/File/71657308407.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/54805734383.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce00c4f598---xivoporazo.pdfIn PDF document text
    • http://watsonwilliamsreunion.com/clients/82103/File/tivowepevakipaju.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/91078a51b46eb06d9f19f1b4c59d2546/podenonipomexogoxudarisip.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/edab45f2bd31a66e164d536a2caf8da5/71398283212.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/13830537780.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/57141856500.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/55278310144.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=max+builder+hall+5PDF 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_off000124f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F1 10324 bytes
SHA-256: 512a525e3170447a2e3a2c7c5aaf22a15863ca66f950eb78804ac42103f2452b
font_01_sfnt_off00013c4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C4F 19336 bytes
SHA-256: 088dedfbd8bf957458333d1f621da45f0f6e0239967a4175aa17d5f703d2fa67
font_02_sfnt_off00016f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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