Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6318bf189a43e0f…

MALICIOUS

PDF

92.6 KB Created: 2021-05-25 16:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 82e9accb111a85fecca289ef4c802b28 SHA-1: 803917672dc98ecfd51980bf3b40545f86d3d344 SHA-256: d6318bf189a43e0f0895be61194adaaf217b85658ff05f5e139ebcf33e9e1520
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other domains, likely intended to lure users to malicious content. The document body contains garbled text and metadata, suggesting it's not meant for direct user consumption but rather as a vehicle for the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pixomot.ru/uplcv?utm_term=marvel+cinematic+universe+film+series+crossword PDF link annotation
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//89432075032.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7b1dbb214---12440525110.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/8201458165.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab37499d0be---28131783053.pdfIn PDF document text
    • https://airshow-bg.com/file/logijikabidazepamupudoj.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/kimosgm99a7ec6gnv8r52t3nse/jokezugovezufun.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609262cce5361---19019732641.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/35239281715.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16099fdb0dfe6d---96990753551.pdfIn PDF document text
    • http://abpaluso.com/upload/file/5988003408.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/8c04f87fb24f436bc336ae55ea7a5c31/rebewuzoburenopon.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713062139c7---xedinuluxerez.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796c4974da8---jokaxasifuti.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a72d0d2980f---60692974737.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa89ed22427---raloxas.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/482b30cf5a1764b1ef450d8ec62fcc1b/17549315825.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078e55e4f0cb---dokisebatugo.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/ef42bebf0928a4abe10d9b1b2c5fa6ab/fosawifiwalemaso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off000109b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B3 3044 bytes
SHA-256: 3112424033e8e1a9be6894b0152791b5deaf9643dca8185a84004a7b9addbfcc
font_01_sfnt_off00011488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11488 5324 bytes
SHA-256: ce6453fb46405eb9faf791e1f6d308e483210ed58d5badc74e9594d04136dc8f
font_02_sfnt_off000126ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126AC 11572 bytes
SHA-256: ea813322fe4b4897c139fd1ec080e77479cbb43a351ad5ece86661af1ff1c1f4
font_03_sfnt_off00014e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E69 16204 bytes
SHA-256: 48aff817bde83783653ef2c2e952d5b04229e9ab14dea8968ba0602ff0718588

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