Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f65019acfccd98…

MALICIOUS

PDF

83.3 KB Created: 2021-08-28 18:06:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 02595d7bf0f9810243120d01abc64d03 SHA-1: 6028df1c6674dc2fa59cd2f21bf416d206bdd1d7 SHA-256: 70f65019acfccd9837211ff927cd16346557a698f9ffa517e379fd08f90f71f0
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' specifically indicates links to compromised WordPress upload storage, suggesting a distribution point for malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://inwebjor.ru/uplcv?utm_term=two+tribes+brewery PDF link annotation
    • http://gtshotel.it/images/file/fuxafuso.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/1qmtjjkml46boae6je2eo8q94q/webupavajurusakatuz.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/2187343483.pdfIn PDF document text
    • http://thaoduocvn.com/userfiles/image/file/zetazabuki.pdfIn PDF document text
    • http://qamsar.org/userfiles/files/jugekatefenuvolomodonabo.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a12d4f471---risufojabomuzaje.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f8f5cc98c---33899032708.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a90eb9ba995---6934858572.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/77821754094.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/kexusekug.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/kepurezokida.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/58778091601.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/2240980c8f3f1ec8995d6a90098d1158/bemefi.pdfIn PDF document text
    • http://ippinnudon.com/uploads/files/36399547788.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/161234f368f003---xokezemu.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/58a1ec922bd941c2bd3ca7b9dd0b6aeb/87562591587.pdfIn PDF document text
    • https://krusomying.com/data/file/bizuxamitaramigix.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/57029636960.pdfIn PDF document text
    • http://suphammamnon.org/uploads/files/5143925420.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b70ed1da1f4---jufoteditigolis.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/92587590635.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087778dd3a6f---16732854865.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8n625foobugdo032oj5c47pa36/lusow.pdfIn 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://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_off0000e224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE224 10092 bytes
SHA-256: e2b074413f9c8b7c3a82eacbf1de04c2e71af6f2cbde860878cd74eeb747fbce
font_01_sfnt_off0000f8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E2 18180 bytes
SHA-256: ea9062f19e4c2b434d12c83d5baa873ddb9a3eeffdb241caad68d22375988b86
font_02_sfnt_off0001281a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1281A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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