Malicious PDF — malware analysis report

Static analysis result for SHA-256 177575ff0048a8f4…

MALICIOUS

PDF

104.8 KB Created: 2021-07-08 00:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2795f88d53d0f4943b07acb9f6a08125 SHA-1: 178f8eb883d7ff0825fe5cf1c39b2c683b69c1ba SHA-256: 177575ff0048a8f42403054522593f03d250a806231ff603bb5cbf974882e5c2
184 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, directing users to potentially compromised WordPress upload directories on disposable hosting. The presence of multiple URLs pointing to PDF files on these domains suggests an attempt to distribute further malicious content or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a76585769e---neforewixoruvugorulew.pdf PDF link annotation
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e2b77d0c6---dedezixu.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/wegedotiv.pdfIn PDF document text
    • https://bayihoki99.com/contents//files/78442534438.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/gukutipuwemenoxupuni.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/sumulurunavud.pdfIn PDF document text
    • http://szrealty.net/uploadpic/2021-5/file/2021050918305473499.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/477f08558ac7f658ee9bc2148b8ff474/39154471152.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e44e6ee98---65639276888.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/885f89919c0bdc11412f8b92985c3757/85366452262.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71e4c4b75c---51648172803.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073ccea03f98---zunik.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/fed8900af7558f8763495a0d42726fd8/migilil.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b23cd1b18---rinifuxebovozexe.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609600bf62e4d---38320288336.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/4996de2b6d71cdb9a20070c80def08f8/54367877371.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/tikeneretapirisalita.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/wegurolivikigu.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c6a4e77ed---kefufovusepegaxik.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16092f16f742e4---jinuxokikalogojawogofa.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160927aee72a44---niririrogesunez.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/obq4afm997slm0ggnbo6nought/51435378210.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=gloria+estefan+anything+for+youPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACC 10744 bytes
SHA-256: 372846fdd7697dd1450fd9921d35ca97b014dfbe61c22ff33b4653697723909d
font_01_sfnt_off00014385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14385 18532 bytes
SHA-256: b68fc4be63888646cc6eb0a94e847cd3d81bf6e76cb08a863fb5b3ac79438c15
font_02_sfnt_off000173d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173D5 1700 bytes
SHA-256: 15171638d69c9281a983de8a04f8d213e5ed86d33053034f6aa0dd130c4010d8
font_03_sfnt_off00017bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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