Malicious PDF — malware analysis report

Static analysis result for SHA-256 556dd838390fb656…

MALICIOUS

PDF

241.4 KB Created: 2022-01-24 07:44:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-08
MD5: d2c997fbb17e6d963d1a4062762b8bc6 SHA-1: 12523fb8ce11eac583fa29739204e6597a79a178 SHA-256: 556dd838390fb6560689484487031bba114b21a50391fa7a7298f5549fad03c1
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6670

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
  • 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.
  • 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 http://solarexperte.ch/fckeditor/editor/images/file/72702519310.pdf In PDF document text
    • http://kolarskiemp.sobotka.pl/userfiles/file/3891280505.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/rojorugapukazeranug.pdfIn PDF document text
    • http://xn--9d0bk1sn6gncq95flql.com/user_data/kcfinder/files/wimanag.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/67684702182.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161700a015ed04---29671386836.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2022-1-16/20220116095018298919.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/52a3d16d4cfa8528544ab65301026f92/53057995051.pdfIn PDF document text
    • http://japhina.com/upload/file/24436920506.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1618891dd5c51e---41538990610.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/wigidigimafagoremevafag.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/sadizemipugavex.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/57927337737.pdfIn PDF document text
    • http://lemarsk.sk/kcfinder/upload/files/tubesixopudugevowujefawu.pdfIn PDF document text
    • https://frpeteradeyemi.com/userfiles/files/41042613932.pdfIn PDF document text
    • http://hnhappiness.com/d/files/31379067875.pdfIn PDF document text
    • https://www.v-investor.ru/kcfinder/upload/files/82781732069.pdfIn PDF document text
    • https://www.zwaanshoek.info/gibreto-cms/xcrud/editors/kcfinder/upload/files/3029244412.pdfIn PDF document text
    • https://tktravelkorea.com/FileData/ckfinder/files/20220115_1A26BD14BA73581D.pdfIn PDF document text
    • https://zlataraburmevuckovic.com/files/32133376913.pdfIn PDF document text
    • https://noursportevents.com/wheelmarine/userfiles/file/wesaxedikibumam.pdfIn PDF document text
    • https://full-e.com/app/webroot/userfiles/files/20220101_130507.pdfIn PDF document text
    • http://krasneclanky.cz/uploads/lixatasemivigomodupe.pdfIn PDF document text
    • http://theatergruppe-nestelbach.com/rogan/admin/fckeditor/bilder/file/jikabenewumiteluwipunu.pdfIn PDF document text
    • http://hoachattn.com/image/files/puridufadununefumazaxedij.pdfIn PDF document text
    • http://auto-rad.pl/userfiles/file/70314614978.pdfIn PDF document text
    • http://theclelandgroup.com/img/upload/file/vikipuzebolikapovu.pdfIn PDF document text
    • http://damnoen.com/ckfinder/pho/files/sukuludabetusojadivibut.pdfIn PDF document text
    • https://dtcm.meetingmindsexperts.com/multimedia/userfiles/file/54268216955.pdfIn PDF document text
    • http://alanaf.ru/userfiles/files/danudaman.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/molaz.pdfIn PDF document text
    • https://liho.cz/UserFiles/File/fewonagekuwota.pdfIn PDF document text
    • https://malinaionescu.ro/userfiles/file/naduliritusi.pdfIn PDF document text
    • https://maytinhdalat.vn/images/uploads/files/79565999338.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1618d0045088c5---4319914548.pdfIn PDF document text
    • http://beijinghuojia.cn/userfiles/file/guvikuz.pdfIn PDF document text
    • http://duef.ru/public/file/koxudamavexowowudidisoz.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/839843bad287a6d8a5691394d74ce025/52027985411.pdfIn PDF document text
    • https://abcoegypt.com/userfiles/files/fanani.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/EqozwcbAC44/uplcv?utm_term=sodium+hydroxide+safety+data+sheet+ukPDF link annotation
    • http://www.thaiticketmajor.com/static/imgUpload/files/kojikipozemewadokosetaxan.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_off00035227.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00035227.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00035227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35227 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_01_sfnt_off000368cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x368CB 10952 bytes
SHA-256: e267d0d49da31020798a4600590cd5994e89993a7c1aed5bfcbe446b4dce26b4
font_02_sfnt_off00038243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38243 19400 bytes
SHA-256: f284754cf6cbea9c3800a39e5510b94efe6f2a782a1e24e220272be232d2a52a