Malicious PDF — malware analysis report

Static analysis result for SHA-256 7000b675d7a7806c…

MALICIOUS

PDF

148.9 KB Created: 2021-07-05 01:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 3aaa85b1971ef285d67ea66a42073bbe SHA-1: 35521298c724e73c3e9fbe24fec280bdac91078c SHA-256: 7000b675d7a7806c2fd3179f13e706290b9cce588198e7c1b56e3263d423ab49
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with many embedded URLs pointing to external sites, some of which are hosted on compromised CMS platforms. The document body is heavily obfuscated and unreadable, preventing further analysis of its specific content or intent beyond being a redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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://ecoretras.com/file/27348946130.pdf In PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/da59e8fb48565fada3799ee3ea0a5069/fogusisufalikevoxa.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021052914511743.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/bsssntpmf14l4qofvcpvaghho2/rigimuwolawiposizida.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16076582ac1f33---86446137666.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/28379313233.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607195230bc39---15845108726.pdfIn PDF document text
    • http://cartopack.com/Images/file/88919709154.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160969846b40cf---labotave.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/c9189894f98ceb5fcd93aa7ec09be23f/70854549503.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/4bef303f266e0a455754034e2951064c/67315999156.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b630541546---39781193075.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/vepigatuxififebufo.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609359d007c32---xisebufik.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16077e148a824a---vewimitoxogadelase.pdfIn PDF document text
    • http://willbramephotography.com/87802280422.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/nopeguwejipexapelegono.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/a0ca2ef192d92a35083cb18ddbf88cbd/80134424234.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/xagewoneniriromineziv.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16081ab7d80ef9---rokorifanukoralepoj.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a32ce1af3---dewozasab.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/3ea0656425envrrcghtggvcq5n/58999040282.pdfIn PDF document text
    • https://mimpishio1bet.net/contents//files/60572955327.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/72f854a03cd8b6fd2113edefa147be4b/43240552383.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=immersion+in+water+baptismPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C532 10544 bytes
SHA-256: 0975804552b1f78791b9e3bca2a136c842689179530eb56e3d5d457f909ec8a4
font_01_sfnt_off0001dd0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD0B 16232 bytes
SHA-256: 96182bed04a62137ad93d8757ea3e5d1bd5a87afa50488d16b2962c7d2144e88
font_02_sfnt_off0001f2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F2EF 22628 bytes
SHA-256: f3661da4120afd34788e46da94e4b089f433a3ff76771c47c95d39b5be0e0249
font_03_sfnt_off00022d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22D31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1