Malicious PDF — malware analysis report

Static analysis result for SHA-256 f32b3eb430a3294a…

MALICIOUS

PDF

91.7 KB Created: 2021-08-01 11:28:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1fb632b8099e9d28c6c3a6e79c4ccd7c SHA-1: 3a31d24e683fa8bb18fdf222106ecf847eb48b39 SHA-256: f32b3eb430a3294a41b49df8e8505505792752ae6afc3d97447891a72619765f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious content. The heuristic 'SE_CALLBACK_LURE' indicates the document may prompt users to call a phone number, a common tactic in tech-support scams or callback phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/d5e3f8fcac48e45333d99da6c19e1b4f/11142760462.pdf In PDF document text
    • http://ahchala.com/img/file/zumidinigogigu.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/30022724182.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/vezogipopulaxajenuvine.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b48bc1da4c---38656943982.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d2d59bd16---55170441014.pdfIn PDF document text
    • https://doosradashak.in/ci/userfiles/files/9962600055.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a89bd633200---89473615018.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/33464098231.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072e9b7ddedd---ninabowuganofudivevuz.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/xazuwo.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/modoku.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/m1h5rd7cmkujtmnug40ilval8j/gadid.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/vulenubujesepif.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079eaf3b467c---lujav.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985d636cd6e---fopixinawawotajulej.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a874665294a---paxokodojokevozogovapexa.pdfIn PDF document text
    • https://vvpta-irvine.org/userfiles/file/25180800950.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbdcc24b03f---kupevunijuzo.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/zudewekotuteduranejudovi.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4c892ac48---wuwifasu.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/kumiv.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/wibesufixetowinib.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/46976240064.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839fd58d688---38103453163.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+to+apply+for+new+born+australian+passportPDF 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_off0000fe63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE63 10784 bytes
SHA-256: 4354fd2866b15474c8f5fa7e49e1a9decd9e173f116018fb874dcf5a08d087e2
font_01_sfnt_off00011733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11733 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F45 17228 bytes
SHA-256: fab174976b28cd76a9afd581c4d497e590f1091f59cef9fb510ff9f440eb7255

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