Malicious PDF — malware analysis report

Static analysis result for SHA-256 597b3b8debb93150…

MALICIOUS

PDF

98.0 KB Created: 2021-09-01 09:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e6011269bc2fa826f8a18344230dd51a SHA-1: 7945684afcdeac7e6015876d63887e22e643612f SHA-256: 597b3b8debb93150df7b32e747055b9a3e9b5cdea0131693b3dd9bf9b5ccbc9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to numerous distinct hosts, many of which are compromised WordPress sites or disposable hosting. The embedded URLs suggest an attempt to distribute further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c29214c07bc---wuxutodovoda.pdf In PDF document text
    • https://rowadalbyt.com/userfiles/files/gewavaruwekorozelateg.pdfIn PDF document text
    • http://sixtyguildersresearch.com/admin/photos/file/6917647732.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/b6fa1e378b1d210c5182aea498c34800/67376642140.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/jusotegetasevulugopew.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afceae01aaa---13645235973.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9c75efdb2---zorekivibidekutir.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/dinololubuzasewaxijodajeg.pdfIn PDF document text
    • http://helloslow.com/data/userfiles/files/13332840362.pdfIn PDF document text
    • https://virtrade.gr/userfiles_lybo/file/68532434682.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/6ee6d0e35126c816e8d133d1ac56c16b/3823138337.pdfIn PDF document text
    • https://sieuthimaytinhcu.vn/upload/files/90033265752.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/45533642642.pdfIn PDF document text
    • http://kco.su/userfiles/file/44678388732.pdfIn PDF document text
    • http://haozuowenwang.com/imagefiles/file/jowerufidufodubopinawuk.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc1785cc38---11210097747.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/r8vkpv7m1evgvdh5bs6j456jdb/kinivevaxajemejuxojite.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8bb443c87d---pupitup.pdfIn PDF document text
    • http://landroverbh.com/ckfinder/userfiles/files/17613524404.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/26ee049d80c6921c0f559405d1c43296/18737759197.pdfIn PDF document text
    • https://bdblue.com/ckfinder/userfiles/files/29667322646.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9ea4a392d---jexugini.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/84343811663.pdfIn PDF document text
    • http://scvumaichiramen.com/uploads/files/rapodasiwenepib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=work+time+hoursPDF 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_off0001191c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1191C 18848 bytes
SHA-256: cdd5c0efd8d3cb0d3d0896f0ed31d12ccd8bdfadd9c01f461891d6ddd55393ad
font_01_sfnt_off000149ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149EE 10244 bytes
SHA-256: 1accbe201e2e0f15ce9cb7e67084e80a764367b6d5e9559487c96e2a70001ea7
font_02_sfnt_off0001610a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1610A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.