Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e140d08a10ba85…

MALICIOUS

PDF

82.6 KB Created: 2021-08-30 04:19:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0999b7b87ab9c0cf2b811bedd7e0b132 SHA-1: 73514e5b3b3ee1f3fb25cc4e3cdb4846519b6d17 SHA-256: 07e140d08a10ba8515cf4737148d7347b07337e543c75f665ad7ed7c88d0f885
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://crewmak.ru/uplcv?utm_term=mowing+lines+in+lawn PDF link annotation
    • http://am-assets.com/aom/magnolia/userfiles/file/56510109944.pdfIn PDF document text
    • https://illinoisfiscalpolicycouncil.org/app/webroot/userfiles/file/manuwarifitarilokajiwuli.pdfIn PDF document text
    • http://otevrel.eu/ckfinder/userfiles/files/tidimofanevazowuv.pdfIn PDF document text
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nujoko.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/p73eac1el7r060ihh9nuo722j3/riworutamokunitedozufujat.pdfIn PDF document text
    • https://derey.nl/app/webroot/files/userfiles/files/96505327619.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e8936d492---nixilakusedumedot.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bd9323ec1---2607038102.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/68125589906.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/a8e636e48b10f22a92b58e137a6897db/lodiwemufikapo.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609668367d624---56810447155.pdfIn PDF document text
    • https://discovery99.com/userfiles/file/13486945247.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ede29a7b43---fevorew.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/66056356665.pdfIn PDF document text
    • http://nbkhjc.com/uploads/202107/file/2107310355178906723xt50zzrhu2v.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c1bd683baaf---mavegidew.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/7qk3b7kvlmgs01n4pipu6jvgdk/91999622552.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a96bb59a547---95682929691.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/he80nvs7lc5rc2ga1vo0kmrq31/zufijabitoruxuxilize.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/xurixozejatukuwaweme.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad14cefb41---barijipusupo.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_off0000dfc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC7 17848 bytes
SHA-256: 852a88b102998a7c35661127d0877ef06b673f8deea1139bd98bfd413b28151d
font_01_sfnt_off00010e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12661 10164 bytes
SHA-256: 47bcdb604a069c3ad97d69ea9b9301ede5b1603edc65b0f88a9227e2dcf139b7

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