Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd0cdd89c29926d2…

MALICIOUS

PDF

70.9 KB Created: 2021-09-29 14:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 93217fcf8c5aab9be0ab59a3f8e43761 SHA-1: d183831ecb002854067a5ab61f26995e3d233d1f SHA-256: bd0cdd89c29926d219ca8ab6a2aee7b9728772dbab7872ba986fd8d30a26e3b6
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. The file functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains, likely intended to lead users to phishing pages or download further malicious content. The presence of multiple compromised CMS upload links and disposable hosting domains indicates a deliberate effort to obscure the true destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://odlingfamily.com/userfiles/file/zidute.pdf In PDF document text
    • http://pincesorvarshop.hu/editor_up/rakemigexafewewe.pdfIn PDF document text
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/xikixufu.pdfIn PDF document text
    • http://mobiliteit.nu/files/wimikunonosadujokasilopa.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/57375904070.pdfIn PDF document text
    • https://dpengineers.info/admin/userfiles/file/9129721980.pdfIn PDF document text
    • http://lsbwg.com/ckfinder/userfiles/files/20210920/2158044710.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/7755f2b377d6a5623125193d5e5017aa/33376146342.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614257c1426a3---74472915764.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3fe7d27eb---xipanusorox.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/48799347946.pdfIn PDF document text
    • http://damutech.kz/upload/2021/09files/210901111614038047cesc0.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/89396606989.pdfIn PDF document text
    • https://jin-ji.com/upload/files/94469256163.pdfIn PDF document text
    • https://tssch.in/tssch/application/admin/uploads/file/62626701402.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/5f137c7a337c1465748bbcfd4a86fb5f/detatuwagikaroseduwimamo.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0bf60d549---duzenajamumijizodag.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/netoduvuxigozawakelif.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/j3elc9teld76c0lgrgqh22nnc0/67771068658.pdfIn PDF document text
    • https://guitarenko.fr/img/files/68333419336.pdfIn PDF document text
    • http://dvg.asia/ckfinder/uploadfiles/files/nirexuvipezerutevojevi.pdfIn PDF document text
    • http://falerisztika.hu/tmp/kenojevudotos.pdfIn PDF document text
    • http://karthikeyanjayaram.in/userfiles/file/9842924271.pdfIn PDF document text
    • http://zzfcw.com/file/fkimg/file/zibenoribiduneg.pdfIn PDF document text
    • https://ventadeterrenosurbanos.com/userfiles/file/35657928208.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=chicken+wing+muscle+diagramPDF 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_off0000b2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2A2 15968 bytes
SHA-256: be666e686f83005cdf40017f3eeb5ab7ab729eedb922dcd84314511295359a8f
font_01_sfnt_off0000db97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB97 10908 bytes
SHA-256: f72877866235085f139709c8e8212d655ba283e923a1d479897bb02c9d6b8eb5
font_02_sfnt_off0000f477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF477 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1