Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb018a55f2d9860a…

MALICIOUS

PDF

540.7 KB Created: 2022-02-06 12:49:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-04
MD5: debbdd706b620b9f4e0c444d235a6464 SHA-1: ac19b4199cf53caba22d2e6e85d3bc3f7efe1ce8 SHA-256: fb018a55f2d9860af7961125b0cab0982c10bdea200a4919816a5e9f88e5271a
216 Risk Score

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4172

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • 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.
  • 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://colod.co.za/XSRYdR1H?utm_term=cell+differentiation+pdf PDF link annotation
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/945c8a34ee3ca6a3ec9d87c0ed3c98e8/12667047067.pdfIn PDF document text
    • https://rafaellopezehijo.com/upload/files/robolizibekavunevi.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/3744701877.pdfIn PDF document text
    • https://voskovefiguriny.eu/kcfinder/upload/files/jetab.pdfIn PDF document text
    • http://kangshi-you.com/uploads/files/202111080858038478.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210728011712.pdfIn PDF document text
    • http://fatename.com/uploads/files/202108280611376579.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/boxuvawut.pdfIn PDF document text
    • https://holycrosshealthcare.com/userfiles/files/pejivepekogowunakato.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/95363976024.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615da2119bbc6---taromiwepofiwurexeri.pdfIn PDF document text
    • http://sinice-rasy.cz/files/file/kizogotawefidixekanib.pdfIn PDF document text
    • https://cncunse.com/d/files/41963173679.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/787dfe0e74a8c2ee4864a8074713fcde/pitoxugireta.pdfIn PDF document text
    • https://decoveinvestment.com/userfiles/file/18513451512.pdfIn PDF document text
    • http://tmservice.nl/bestanden/files/72692202144.pdfIn PDF document text
    • https://sharedsynergy.com/userfiles/file/mepafubize.pdfIn PDF document text
    • https://zooiguana.pl/app/webroot/media/files/10429096632.pdfIn PDF document text
    • http://mishelik.ru/userfiles/file/selagago.pdfIn PDF document text
    • http://imoroz.by/upload/file/75599349150.pdfIn PDF document text
    • http://veterinarioassociatopacinidallatorre.eu/userfiles/files/jozaf.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/zetepewikezez.pdfIn PDF document text
    • https://tahitotfalu.hu/ckfinder/userfiles/files/71507195624.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021071303484846.pdfIn PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/56105042451.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/vudufexaxizuvozoxedutoz.pdfIn PDF document text
    • http://www.cidadania23pr.org.br/ckeditor/kcfinder/upload/files/sabet.pdfIn PDF document text
    • https://cristalparkhotel.com/ckfinder/userfiles/files/80350183318.pdfIn PDF document text
    • http://reklamaopole.pl/userfiles/file/nelagalo.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 extracted file (font_00_sfnt_off0007f9ed.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0007f9ed.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0007f9ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9ED 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off0008110d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8110D 10356 bytes
SHA-256: 89848ee70a642307d8b57c704f1dd64f5bccb9ecad7661ec07462bc6792c47a8
font_02_sfnt_off0008287e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8287E 19192 bytes
SHA-256: de0890e310f66b31173e759d024b62188ab51a101f8a562eb59545e403fa873f
font_03_sfnt_off00085afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85AFC 1720 bytes
SHA-256: 4d9f00dbd572417addd2c08c3ac3ef02775623f166edf795af0fe75c92e90b91