Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0568565ec7e6220…

MALICIOUS

PDF

80.1 KB Created: 2021-07-04 11:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 89eddedde83f86e9b2bb2e9888844d01 SHA-1: ee63f36915e8d855ce60d9a539693ed2d03745b1 SHA-256: f0568565ec7e6220e914ace62f571819ac231dc72f4e9ea50ee3633307011890
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which appear to be hosted on compromised CMS upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing or malware distribution sites. The primary attack pattern involves using the PDF as a deceptive landing page to redirect users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/07e8bddf60499c80fb75af744e82be67/18928000553.pdf In PDF document text
    • https://espiber.cl/images/uploadedimages/file/31158587743.pdfIn PDF document text
    • http://euro-ex.net/images/blog//file/mixed.pdfIn PDF document text
    • https://rent-1.es/ckfinder/userfiles/files/wuvusu.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a26ddb2fa92---38264940484.pdfIn PDF document text
    • http://fabtur.ru/upload/files/50226698759.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160afc02306fba---15262917413.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/281253537218.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/zolonobosugerasifabanomuj.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/1af1359ef4d701a51ac18ee5a0619f31/13442456374.pdfIn PDF document text
    • https://actor-conseil.com/files/file/divez.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/gfo20acsuelsv723ikoqk9h2b0/xewazuvubifotude.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/9isr4uitgmud5a2kam8qlt6m2g/memijifonapo.pdfIn PDF document text
    • http://normel.org/files/upload/file/10390175355.pdfIn PDF document text
    • http://washchienluoc.com/upload/file/perawogakefa.pdfIn PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/webaxeza.pdfIn PDF document text
    • http://sparkpro.lv/content/file/56931292141.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607305b006241---35539869435.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e00c4881034---gukuwazitod.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16089e01bc8f7e---64081765968.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/1udvu5tep19913d6fpipb1nb5p/dosivuxivapadoj.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/bowiwekenixupujibaguge.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718b717cfcc---nanerabofaso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=true+to+the+game+2+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD600 10720 bytes
SHA-256: e7069869dd88eea1f05c9b8186494c4970855bd52b7156f40ea31c5fdf20d849
font_01_sfnt_off0000ee83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10695 17140 bytes
SHA-256: b3eb0db9cd1a9fc1a78ed2dcf99cbd7c606d016f15ffae59c6d075ca017ed93e

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