Malicious PDF — malware analysis report

Static analysis result for SHA-256 04534e5064686fe2…

MALICIOUS

PDF

92.2 KB Created: 2021-06-26 08:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2cd6cb29d7c57bf7bcd84e955a80fa8a SHA-1: 094d1f3b567dc38da32e638cce9b592ea9bb6dc9 SHA-256: 04534e5064686fe294dc39b58c42c802991ae50c790c2573962e3a77424eaf51
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using non-clustered, disposable hosting for these links, which is common in phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://krisoc.ru/uplcv?utm_term=two+ways+to+belong+in+america+purpose
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/2c97a15c9c8b9f341a26d331ff5499da/zazowabekekefifewaw.pdf
    • https://pima-alarms.net/slicice/file/fojiberuwajirigibimid.pdf
    • https://eobliecky.sk/userfiles/file/88286467202.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a25c15175cc---nipalatiseluxan.pdf
    • https://mttrasportisrl.it/dati/upload/file/zopusujobena.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b38df8f5f14ac814a65dbcfff1b8d9f4/nokuzelokodatimunubifun.pdf
    • https://decoveinvestment.com/userfiles/file/kifik.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/907461297691a07f8a8723f2ab3fbb86/tubufokifuzibiminiker.pdf
    • http://poslovniimenik.net/firme_data/files/riwotoxizegatisatenisen.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fcbac86c8---munenitimagoj.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd4f4e02d6---84548350280.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89cb0f2a8f---rafozoxu.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092bd49c2744---18117121022.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/6d8468183ad35f90a546418b7af9f0ca/92263679536.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/1b55f215249fd9a6041981bd0a0955d6/32734223942.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/282a7f3e01b11327776c863136317ddd/44274764747.pdf
    • http://hifitness.hu/userfiles/file/rabodamigelapesetokulexiw.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/kcpfc1aomuo5v73uggm5lkivt0/18683028046.pdf
    • http://bindashnews.com/userfiles/file/vopejedinaxef.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f64f5f1ba---94063184085.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/ktjl9mht069826gbdm14khiekg/41161918153.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae14035a591---takimenusujiwujefebiri.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b656117baa7---xofomumezibureli.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103ea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103EA 16792 bytes
font_01_sfnt_off00011c01.bin
b0669b853aac288d9e57ad14c29267e0e005e02488137afee9535fa3f410b263		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C01 11120 bytes
font_02_sfnt_off000135d9.bin
caaa7cfc318c51221462d72f37524ddb3ea1aa279a898b17eaed6ce476c97ed2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135D9 17016 bytes

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