Malicious PDF — malware analysis report

Static analysis result for SHA-256 a05cf97a84ddd694…

MALICIOUS

PDF

83.3 KB Created: 2021-09-17 09:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 958d5551cb26ea29234c24a453aa19a7 SHA-1: 5cbf26ab2eab21266b341601b9b29c7bc840bf2a SHA-256: a05cf97a84ddd6947f4fea8561fe5256ffe7e80fa2029e3383dae43b4aacaeb3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to various websites, some of which are compromised WordPress installations, suggesting an attempt to redirect users to malicious content or downloads. The presence of external URIs and a link farm indicates a likely attempt to distribute malware or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://queure.ru/uplcv?utm_term=car+game+parking+download PDF link annotation
    • http://zonazero.es/userfiles/file/xolaxutokewe.pdfIn PDF document text
    • http://wimborst-ceramics.nl/ckeditor/ckfinder/userfiles/files/41366727163.pdfIn PDF document text
    • http://xn--80aer5aza.xn----htbdepbihnfb8cyg.xn--p1ai/ckfinder/userfiles/files/77011480538.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/bujovonelufufefinepev.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136563be7bfc---taguxufanesuxelenopaleze.pdfIn PDF document text
    • https://buonoantonio.it/userfiles/file/zokifetawifef.pdfIn PDF document text
    • http://aorganboys.handyfriendship.com/upload/files/58260765509.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/52552924937.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/9952c928d82b272cfc360f1070878705/40777640670.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/161349d25d289a---xogawogesubal.pdfIn PDF document text
    • http://gmart-express.com/demo/uploadpic/file/16304035254.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-9-3/20210903215429185207.pdfIn PDF document text
    • https://kenkochaya.com/user_data/ckfinder/files/pejugevifiriwubeso.pdfIn PDF document text
    • http://bienbao.net/uploads/files/guwewobulivenisazogajivom.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/litekiri.pdfIn PDF document text
    • http://teamhead.net/userfiles/file/moridis.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/202194_182922_617.pdfIn PDF document text
    • https://alansglobalservices.com/ckfinder/userfiles/files/90987488646.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/feferidimefedotexebowe.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4d1e88442---77321320328.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/jegoteruvafukivomo.pdfIn PDF document text
    • http://nordicwalkingturak.hu/_user/file/pavolavegujejaza.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613019bbb8eff---vusesopogamevexupeni.pdfIn PDF document text
    • http://northcity.rs/slike/files/lelapanipalebepeta.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161408b19d9474---61162374275.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_off0000de9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9E 18496 bytes
SHA-256: 70ae0c4708c4e4bf1dbbdf13328135dfc296e6cce38677d8ee06fb4c6a098fb8
font_01_sfnt_off00010ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E0 10680 bytes
SHA-256: 45b685861842f8a0bbb18ffba7addf795595c4073b3999e58d95695947540f2b

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