Malicious PDF — malware analysis report

Static analysis result for SHA-256 d60f9f7a76b6f01f…

MALICIOUS

PDF

86.6 KB Created: 2021-06-26 13:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 89b2c5189c3c25be1a4b2e90692aab57 SHA-1: 4aa2338d7719c820db4adca06eec9291fdaa95e2 SHA-256: d60f9f7a76b6f01fdac848fd14d2e2c84102b45b3181bbab44d82ef552205e51
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution lure. The embedded URLs are likely part of this scheme to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://laser-piskovani.cz/democms/userfiles/file/teramujuz.pdf In PDF document text
    • http://bitite.lv/media/txt/122/file/90371106338.pdfIn PDF document text
    • https://parokisantolukas.org/Uploads/userfiles/files/vubulovobejome.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/54218859562.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/97678589457.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/dokusupazol.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d086975cd9---8205096794.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/53206075070.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b698e5dc6b---53149726468.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/vanamupufomakokuri.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/92cbfac764a389985b52904a623ab9bf/vixiretoxadefubumowow.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/00c1398a9f4f0be45600defafe226d1c/23922438924.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b79d4cf7aa---sedadojisororod.pdfIn PDF document text
    • http://dgxzz.com/uploadfile/file/1935641462.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/3f4750ab862286eb706fb1e62ee2268f/47021937878.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/72794292049.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160708ba0db708---97483410147.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/47702869063.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f8a58a373---magumibinumuzozi.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/14f27df891412214b5d3fbe0f717c338/46711427248.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/nbq4i2iopbgntq52jk3h9vaknt/29486994444.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd7e323d09---97124720793.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c0d33a881---57392773689.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160730bddd03b3---73749626273.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=only+can+judge+mePDF 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_off0000ef72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF72 10504 bytes
SHA-256: 1406273b4f56dd567f2e63df9c1cf06dd7608a1993c4233fff9887443dbc4ab0
font_01_sfnt_off00010735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10735 17332 bytes
SHA-256: 54e35f2c153d777a5b28cd15217fa1a549755758e2bfd984d4805e02c87605ba
font_02_sfnt_off000133d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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