Malicious PDF — malware analysis report

Static analysis result for SHA-256 366e7fc3720bc2b1…

MALICIOUS

PDF

86.0 KB Created: 2021-08-27 01:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 157f9617bc4c7456b46ecdb64462a27d SHA-1: e2d56d89192e7bc0d844e43afc40b27c396b6c9b SHA-256: 366e7fc3720bc2b19b542a7135b826a0dde55e14c9e82fc14cf18f94029a5bf1
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to various websites, many of which appear to be compromised CMS installations. The primary goal seems to be redirecting users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://home18.ru/wp-content/plugins/super-forms/uploads/php/files/5594b88687273a800143f4b634771dc0/mosizona.pdf In PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc8cd6eb68---vepusejot.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/pererer.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/19836713019.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/33ef2117bd0024e94115c338f99ef77f/marik.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/33571547346.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/9523617120.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/dkn4qd09gsrifmqa6pcuqu2s87/birujupebajodamedaferota.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fdd0c48848d---fuzisewopeline.pdfIn PDF document text
    • http://chochosanencino.com/uploads/files/melopikoxabaxakudotu.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4315ac00b---52943183498.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/wabupuxixugojomom.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/cjrcd6iuv6frn9enq55u4lupjl/5780796687.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5dbf7a2a5b---latoribujobatibenexesi.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/97147233875.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/ruliviwajedejujuririmuj.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/n1gqbnnon9935269natq7tks34/bunedixitiki.pdfIn PDF document text
    • http://taborcapitalpayment.com/clients/d/d0/d0a3925ee25d0adc8806453b18bccccc/File/vinewujitivusujap.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/fc5o56833kudak3ruokht4q3tl/bilutekejinalewet.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/49683995266.pdfIn PDF document text
    • http://z-i-f.ru/userfiles/file/55986744089.pdfIn PDF document text
    • http://pattersonandoliphantfamily.com/clients/875492/File/marofa.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c9268c6f855---wokagumudezom.pdfIn PDF document text
    • https://tidymoney.com/ckfinder/userfiles/files/buwinajokanobemepugamuli.pdfIn PDF document text
    • https://aspirans.com/files/file/sazinatebita.pdfIn PDF document text
    • http://health-bridge.in/upload/file/savemobufurudegixik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=what+year+are+you+born+in+if+your+19PDF 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_off0000e8dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DD 17688 bytes
SHA-256: 43abc0571e6bd0c71f3b46197cd469ba9f279d283ecd2ef1dbe6e404a8572bd9
font_01_sfnt_off000116af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC6 10664 bytes
SHA-256: b2076ebc49ba50906ed2a11c9c301f9cba49b633df30ee734b7d70d58eae2a88

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