Malicious PDF — malware analysis report

Static analysis result for SHA-256 08eba966d4d71f39…

MALICIOUS

PDF

82.4 KB Created: 2021-09-16 06:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 655713caa2f41c919a7d0f59761a9d97 SHA-1: 2f4625377366e91a46fb026a5f6c564a9bfbe9c2 SHA-256: 08eba966d4d71f39bd54f89c26fa2022af155663cd80cefc203a18a304e96bc4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://wastran.ru/uplcv?utm_term=how+to+clear+all+cookies+on+android PDF link annotation
    • https://datajournonepal.org/files/28869861658.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613948564d4ae---nabudijebisaxoxol.pdfIn PDF document text
    • http://ateliergermain.org/sites/default/files/file/40027112743.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/vitasiterilalofute.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/dewowakokuletegi.pdfIn PDF document text
    • https://bankubezpieczen.pl/userfiles/file/63086734419.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/i21nt3bc575kdece7m3ft3eqn9/52742037860.pdfIn PDF document text
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/vabaxuzamepudaki.pdfIn PDF document text
    • http://poliinc.com/upload/files/xadevajapapedinage.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/topokokeved.pdfIn PDF document text
    • http://albertf.madteam.net/ckfinder/userfiles/files/zijubejanarubujagigud.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/76197219968.pdfIn PDF document text
    • http://kronospan-mofa.hu/editor_up/sofakufemodebelelusodot.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/25413328050.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/giboj.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/ponevopofinat.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/b2e16205ebae952d28be9587dea8dc4a/16861348293.pdfIn PDF document text
    • https://ezastupitelstvo.sk/editor_uploads/system/files/zefewumemirafafo.pdfIn PDF document text
    • http://autoachtercamper.nl/userfiles/file/bewubiveduvetizi.pdfIn PDF document text
    • http://groupkaishan.com/d/files/92579113454.pdfIn PDF document text
    • https://mabuksusu2.com/contents/files/73448761639.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/fa603b8f339828754fd178de68d611e0/xobamudosulet.pdfIn PDF document text
    • http://www.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/moserazobeta.pdfIn PDF document text
    • http://xn--80aafbjcazdrhzgiddbbcsg4l.xn--p1ai/pict/file/9140538455.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_off0000dd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0E 10532 bytes
SHA-256: 30fd47b376923e7e1570310c8245a94f657971ae80be891ce1311d3aa840872f
font_01_sfnt_off0000f531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF531 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D43 18112 bytes
SHA-256: 53c030ae9427c75560e2827b8ce971d1fa8cc9d96016ca39371e70a615838d49

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