Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba338817e4bff8e…

MALICIOUS

PDF

76.7 KB Created: 2021-08-31 22:07:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6325986236ae4557906bc36b93caa3ce SHA-1: 74bb9e7f79612d9e1759f836d8ab0539189bbb28 SHA-256: eba338817e4bff8e3d4fc4954188ff0a259a0170d62e62d10a272628aedcccf0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick the user into calling a phone number, a common tactic in callback phishing and tech-support scams. The presence of numerous external links, many pointing to compromised CMS upload storage or disposable hosting, further supports a malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/cfb470a1bb7f225d2aaf93723a2156b9/10453495204.pdf In PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c99434634e334e010a1bd1f9d5f345a3/66567998823.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/zarepikirosekupatebamigod.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/13324789069.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/16491447557.pdfIn PDF document text
    • http://tavaszitura.eu/userfiles/files/dapujezivoxem.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1606e850acf19c---lovabifazetovovezifewez.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/66328094470.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/navilarinulos.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/mabibu.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/f08e9cea9c98456e968b7d2504bba5ea/47769133366.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4b9dd5e84---fosokureseborikofe.pdfIn PDF document text
    • http://dogalakustik.com/depo/sayfaresim/file/borulinuwatozanumuxidana.pdfIn PDF document text
    • http://vejwun.cz/images/44131158337.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/fewone.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3e228359f---47407551302.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160808c604a88d---lomikuzezagejowexerosuju.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d0b43e6e37---bebezijibulatujatalija.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/b2491a43531f941915ff95c52b4c5b28/nadulutopaxurun.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c948f489b19---lejadegawojixip.pdfIn PDF document text
    • https://www.jdconstinc.com/ckfinder/userfiles/files/95694779234.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b905a122efb---4289932950.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/topesosojazirozugetib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=st+clair+county+il+parcel+searchPDF 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_off0000c556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC556 10760 bytes
SHA-256: 081ef223a3e4d259669a5225522211208c0ddd9d819b228cd845261de8dabfff
font_01_sfnt_off0000de01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE01 17460 bytes
SHA-256: 4a3a3c6589b657b4d0fac6e19cce065dbb15f90b7f880824605e614c4339f748
font_02_sfnt_off00010b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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