Malicious PDF — malware analysis report

Static analysis result for SHA-256 7614fa93a9758d2a…

MALICIOUS

PDF

72.9 KB Created: 2021-09-01 01:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 13dfeac0cd57943178845b841dd4fd48 SHA-1: 71e233edfb59d7c7c0622f7641b70a31fa30c374 SHA-256: 7614fa93a9758d2a9824e795d8bb4ed766148941a058cb1f52874e8c93015af3
164 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous embedded URLs pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The presence of XFA forms and the overall structure indicate a deliberate effort to create a deceptive document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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=braised+liver+and+onions PDF link annotation
    • http://mudrkanuch.sk/editor_uploads/system/files/56100777365.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608530fc7fcf8---govutipenare.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6eb818799---61423568828.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b45837eaf---larizepenerisemelo.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bufilewagajufazagi.pdfIn PDF document text
    • https://mytopics.it/uploads/file/dabupawupixibomifakal.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/rigol.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/67894426697.pdfIn PDF document text
    • http://studiomalpocher.it/userfiles/files/83160774053.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/1535279370563cb6c665d60813d91000/gutowufovipajefofadugavi.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/32125471961.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/709901bad5f3e70a19999160acdd1fab/14997626834.pdfIn PDF document text
    • http://wxmx.cn/upload/ckimg/files/202108130049335294.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/3b5k67rn6qs5043l7bdqm82ar8/43526348940.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16086f995a154c---jerof.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/40817393851.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160fd9389dcf06---96119497527.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d4a68ea5b---tasifabodorutafikugu.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/76afc5d0771c7d6eddc1ad3711aa7c1b/funef.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6aef21081---bijumukaja.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160725932c04c6---74147539848.pdfIn PDF document text
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/71171905434.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_off0000bc2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC2A 10260 bytes
SHA-256: 53f3a7cd073a6689a5ea580ab2acf69f2d8447f5aad6b7cee918486ac60b99d9
font_01_sfnt_off0000d354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD354 16344 bytes
SHA-256: a58598edc4711fdcacc452de9d52b912b66a062f9f26582ecd81e891b220a59c
font_02_sfnt_off0000fd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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