Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ddf94a2a61de3de…

MALICIOUS

PDF

84.3 KB Created: 2021-07-03 09:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: b087036c55215ce23313625f794927a2 SHA-1: 7c8415318757acf6248381c4ea18c4c1f05b9d18 SHA-256: 2ddf94a2a61de3de9a748d22b49351075004199917d5f84fd292bae2e8d5cbd6
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple URLs hosted on compromised WordPress sites. These links likely lead to phishing pages or further malware downloads, aligning with a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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 https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/77489a9076424932bbebe0bd6b50b21a/gepefunedogujawedewikakus.pdf In PDF document text
    • https://larrialdiak.es/files/galeria/files/42878435854.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/99351375671.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/159875de9ced18d2ad79cbab8d2f8008/61183792012.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/9df28b1caab305f16f6abf2964c035ef/83289321891.pdfIn PDF document text
    • http://vce34.ru/attachments/file/muvowasufabaj.pdfIn PDF document text
    • http://abroadster.com/files/67308854185.pdfIn PDF document text
    • https://sgotomotiv.org/upload/files/bitajutevupefales.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/7a4682868590a929bfc8fbd7dcd264f2/87745274666.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/8a2cc5fc8d1adc3c19581bbaeaadc671/3593507294.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/dapiwelobawapavo.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/6b4d23aa4371c5aaaeab95bcd0ffc8c2/8065705315.pdfIn PDF document text
    • https://bhalakusari.com/uploaded/ckeditors/files/geboga.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/49b5b6a4021580d7a9a82371ba3b6318/jujafuxidi.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d2af5083d6d---85536918929.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3279a974e---rogeg.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/d7fsgqfrcvtjic2spogjqofe92/titepivoxexixexatufik.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a82f8b518e6---50293772249.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/6780d1a5430daa0a4565a6474eed1dd9/62488888619.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c16d0fddf---vovusuxanod.pdfIn PDF document text
    • http://ballstonfamilymedicine.com/clients/861402/File/17092166072.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/gr5dos8gj5l8dgig8t8evb4513/18864917501.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854cbeda3c9---sewunatodurajexiz.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/kupelu.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/adcc120c3dc9b122f8a5cb3d6678979b/71295241912.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/86944146927.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/vv8o34i1uc3e6h030a0ddrljh1/perevej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=about+sufi+movementPDF 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_off0000e99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99F 10356 bytes
SHA-256: 9bf8181ea03d1d98feee6d90c0897136d2e0fc731b3dfd5cb4fc596f69612eb2
font_01_sfnt_off0001011c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001192e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1192E 16508 bytes
SHA-256: 40f51b4c5785c3368a4ab8627672f0c30e8ee72c11e39b4ce9a916931bf614c0