Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46f3b3dd9148297…

MALICIOUS

PDF

101.7 KB Created: 2021-07-03 21:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2ae0bfd274e94d45e5160dc0163de1db SHA-1: 25b652d2de6c2d610d65766e82fb106ac4f43ad0 SHA-256: d46f3b3dd9148297e2971c3d14a42452a908002d3a32d3b1cdf89a44c2552b84
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting it's designed to redirect users to malicious sites. No scripts were extracted, but the PDF structure and numerous external links are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16083f3f1288b7---79690156588.pdf In PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a3f85d891---pogotuwobebazafimipivi.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/girubamovuva.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/uvp77ioh20v190n9h4sd2u528g/fijoponikawofi.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/geketexelekodoxewow.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/15791426375.pdfIn PDF document text
    • http://moreit.ch/productinfo/file/36090321887.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/6jtdbo03t9714n54pq78cpvjs5/wobos.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/4be1c95f54c1513c21ec0cb7e5431e19/51241840786.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1884370908---valekutuguwizu.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/82688915458.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/9db5c73d6cb4d1d636f4d552140719a5/ditefezibe.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/qe97ecu3tsndvdv6fdjvh2mk9t/ludevakasajexedovi.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d645db674---57760995198.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/qm0p9538gs75uko1kvgajckg9t/40591000120.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfbf948856---5408494099.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a06cc5ea5e6---puxasizalanubazaper.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/52333120082.pdfIn PDF document text
    • http://xn--2vxr09c6mc.tw/CKEdit/upload/files/faxitujegejagekux.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/9099aa0728b3b96229c0bb274fb15150/92766418401.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202105/file/1620882907.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/s01e3nnnfairga1kppl5dh21n3/jemopowopejiwawoz.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/texireduged.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a91318287---nudorusiga.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/99401884969.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=all+about+chow+chowsPDF 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_off00012d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D81 10204 bytes
SHA-256: 3f66b70b3e3de9b4d56626294c32ba64776289d4d26cb3f75a82225f2fece25d
font_01_sfnt_off000144ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144AD 17460 bytes
SHA-256: 02b6724c71060b8634419e4190b2a59d17e4b3fa6297e584659eb715b4db46b7
font_02_sfnt_off000171c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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