Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f69779071a9122…

MALICIOUS

PDF

78.5 KB Created: 2021-08-05 22:32:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 93d06c66df0af02c142b33664e7c474a SHA-1: 37bf1999b193a78dc0e76962f03b150551640247 SHA-256: e5f69779071a912262190d1e0f8c06fa6f1af59890164c15901576585c664553
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to numerous unknown domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure and embedded links suggest it is designed to lure users to external, potentially malicious, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 http://awkontrakt.pl/ckfinder/userfiles/files/sojitujitexatodaro.pdf In PDF document text
    • http://infunplastic.com/d/files/12507192106.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/xediteduzesokudufifum.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/81822168846.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/41686715994.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/5c5802c9a65566588cbace035804452e/xubobugaxawosa.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/51497250746.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/32656852630.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5c81a6ceb---mizeloxixidim.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/13878660670.pdfIn PDF document text
    • http://safaraval.com/basefile/safaravalcom/files/gawipazepefoniwexen.pdfIn PDF document text
    • http://hsound.ro/images/custom/file/gekoliresewafetu.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9668dc376---zemotarew.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/jsf5t7p4d56qbstnokt8oecos9/13645719381.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/adf66f8fe3f0a488d6b36140ec8ec477/towilapazewejomofiri.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/715332758fe98702fea21f7750b0cb1a/panotufujesawozali.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca0ecaefcc---20803527721.pdfIn PDF document text
    • https://tadimtursu.com/image/files/webamotowovopimigilulefuk.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/94246218873.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=150+formas+de+iniciar+una+conversaci%C3%B3n+pdf+gratisPDF 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_off0000c783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC783 18340 bytes
SHA-256: cbf8e3a4f0f72c7b06c93d88a9c8faf3c81015c70f315391c9b7551a48412aa8
font_01_sfnt_off0000f696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF696 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAD 11432 bytes
SHA-256: 7bcae9ed446a5a2d69475799b1202da54c7f3a80e22fb57725e1862c28cac84d