Malicious PDF — malware analysis report

Static analysis result for SHA-256 8402c2c29a1d2598…

MALICIOUS

PDF

89.5 KB Created: 2021-06-29 06:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5a2420a61167961de52af38ce4f4a68b SHA-1: 0a94bab4f16a073c6ed56dad205de7fdea47e00f SHA-256: 8402c2c29a1d259853ef03909097a3ec0e2c443b011d0ce049e1c022b27f3da1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that form a link farm, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of these links and the overall structure point towards an attempt to lure users to malicious content, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608467a5ae206---23976498780.pdf In PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/2f78bc4bc0bf6635179427732897e802/sukagizuwirudisabisu.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/72026b9725accb6de54ff3325c803bc4/3282661370.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/21534499270.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/mojalulevod.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/xikumazeworotidupuve.pdfIn PDF document text
    • http://artospace.com/pics/file/98542986540.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a7895d2b1c3---84458030658.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607960633c8fb---zofelujofitezotonuso.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/d1d69aab3ffbc2f12f1c2cddf9a4c568/31883513249.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/t8rpt67mn8r3lcfvk40g2qist3/motekelakepowopiru.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/78de8befa72cd8f47e5153319186b591/malegazanufigumusafut.pdfIn PDF document text
    • http://ibb-online.ru/f/file/vozozajem.pdfIn PDF document text
    • http://reclameindex.nl/images/uploads/vubawivedepovegidudogivo.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/78798344161.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/kuzivuzogofuzixomigo.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/1etta3nsag0nnc6u5gs0ts3pt7/fifebovewiguwivozetax.pdfIn PDF document text
    • http://dietmoitangoc68.com/upload/files/sarulawipigakowagir.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/b629ae4a602dbf99327a8464cd7dc9ef/minonipoxonepubajoj.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9df726d10---28345607072.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9bbe51820c---wexazalulajovuwupenumaza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=paste+image+over+imagePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF972 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11189 10368 bytes
SHA-256: 3b620e38d3d22fd5baff08a35c2b915db5ae5c4b79f5d32e58a9d2e5588717b2
font_02_sfnt_off00012910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12910 18084 bytes
SHA-256: e82b48615d48c706c856653e01146921dd89647c6b8497d0fa468ee361d48aaa

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