Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ea811dd8661c96…

MALICIOUS

PDF

84.1 KB Created: 2021-09-02 05:22:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: cf548447a16f7027be9a335825792044 SHA-1: 4c136d4485784c4c2b6ec41dd114b960518df930 SHA-256: d9ea811dd8661c968e0ae25168c5d64679fb377c9e0eab917c84c1f24f7325e8
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. These links likely serve as a distribution mechanism for further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://laborke.ru/uplcv?utm_term=baked+rigatoni+no+meat PDF link annotation
    • http://hoteldazegliotorino.com/userfiles/files/94388964837.pdfIn PDF document text
    • https://stgeorgedentalcare.in/ckfinder/userfiles/files/25679060210.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf4ce675d4---sukikadapobisela.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/8ek0tgmo9p570bp3m0hg3h9bvl/40569029296.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/jukapowiwe.pdfIn PDF document text
    • http://oralrem.kz/ckfinder/userfiles/files/wowosibiranejixorotawozo.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c54b1a70692---31228814901.pdfIn PDF document text
    • https://kcharp.com/ckfinder/userfiles/files/litowaludulem.pdfIn PDF document text
    • https://mccartha-cobb.com/userfiles/files/34278670241.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/56409645794.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/lqgasufqqsbv7frd0hd1g4ok51/50039838823.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612aaef1aad11---bujoka.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089faaaa3a7f---84211666758.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c3bed4ca54e---99049352367.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/64365567746.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8e73251d1---gekutape.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/8affo4drt6magfsf23r0hj8f9c/gasiduz.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da49573192---37841295101.pdfIn PDF document text
    • http://cloverdiamond.com/file/dugizikepewefix.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c1419b928ca---73586721784.pdfIn PDF document text
    • http://mobiliteit.nu/files/54321934758.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1608f47df6ba16---pugosozanokitalulalirek.pdfIn PDF document text
    • http://matthewsmillsreunion.com/clients/c/c7/c7863f7b93cb17915b2a89d887155530/File/34453547372.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_off0000e08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08B 10524 bytes
SHA-256: 9e7ccbd3f7d227a0f0eba5bd048b1e004fc3ca8c55463b39d10a3b6c8ba7b48d
font_01_sfnt_off0000f84e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11060 19412 bytes
SHA-256: 302674ec78366b727aa1e1070ff536d401b381d29251db449403f74d6845eb85

Open this report in the interactive analyzer, or submit your own file for analysis.