Malicious PDF — malware analysis report

Static analysis result for SHA-256 4afb0c52a90ba1ed…

MALICIOUS

PDF

374.1 KB Created: 2022-03-19 02:08:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d3c5988f554aed319866912b43879fb2 SHA-1: 86583806cd2081fdf7bc0f1e840110e022e531ad SHA-256: 4afb0c52a90ba1edda2d36b74825742613fc559afc56422462d78c6aff2c7f80
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6448

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 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.
  • 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://podar.co.za/XSRYdR1H?utm_term=risotto+con+fiori+di+zucca+e+formaggio PDF link annotation
    • http://hum-lucknow.org/test/fckeditor/file/48621282257.pdfIn PDF document text
    • http://archive-2015.humandoc.pl/attachments/file/75307289616.pdfIn PDF document text
    • https://genia-groupe.fr/images/files/vebilorigegopugumogafe.pdfIn PDF document text
    • https://sandipkumardutta.com/ckfinder/userfiles/files/46733116795.pdfIn PDF document text
    • http://nordicwalkingturak.hu/_user/file/manusavox.pdfIn PDF document text
    • http://watch62.ru/files/files/79504499918.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/nalapenotiwadenovuwako.pdfIn PDF document text
    • https://akgoz.zemta.com/uploads/files/jekizokutezenaboxuz.pdfIn PDF document text
    • http://kingkady.com/uploadfile/files/52834024553.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1621f20fb25085---zijunap.pdfIn PDF document text
    • https://chauphongasia.com/wp-content/plugins/super-forms/uploads/php/files/m1tg9c3c503jt34pui69jul5kt/dewubawuzelunojevala.pdfIn PDF document text
    • http://primewritings.grand-essays.com/media/uploads/files/dijusutifofamesevofe.pdfIn PDF document text
    • http://ordermycourse.com/Content/uploads/files/pevikenuviwobiwaz.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/162120daf45fe6---84718960861.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/2910304029.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/99699886f1df9519149eb9289b990077/mokipi.pdfIn PDF document text
    • https://cserepakciok.hu/xdata/file/61967990824.pdfIn PDF document text
    • http://prime42.ru/userfiles/files/23406383263.pdfIn PDF document text
    • http://tvcsoltau.de/userfiles/file/41785583437.pdfIn PDF document text
    • https://www.ibbfvhn.org/recursos/kcfinder/upload/files/vutazixipizuvivozo.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16211ed1fb8d2d---57193608810.pdfIn PDF document text
    • https://drbumbnursinghome.in/ckfinder/userfiles/files/11148821920.pdfIn PDF document text
    • https://funcarele.com/ckfinder/userfiles/files/75390510537.pdfIn PDF document text
    • http://chenruichem.com/upload/files/saruwobomunoziziwun.pdfIn PDF document text
    • https://childrencareandliteracysociety.org/userfiles/files/79379986948.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/lezitavopikanulaf.pdfIn PDF document text
    • http://chinahanaro.com/userfiles/file///17211671550.pdfIn PDF document text
    • https://springfordfarm.com/sites/default/files/uploads/file/79177314151.pdfIn PDF document text
    • https://lockerova.eu/admin/upload/documents/22695367393.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/42974093519.pdfIn PDF document text
    • http://xn--b1agpbmdtf.xn--p1ai/upload/file/17696048537.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16211bc5a9da68---mamakaz.pdfIn PDF document text
    • http://look.bio/kcfinder/upload/files/8724609964.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1622d90457ec1f---vadabodat.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 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_off0005692c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5692C 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off00058047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58047 18364 bytes
SHA-256: eb0e4a8300d7c6cb6172a3afc5ae2cd9a1bef15e49024e7cfc66c751eae6e9a2
font_02_sfnt_off0005af19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF19 10980 bytes
SHA-256: 6de8ed853d0a78e0c015bb454e2c636bc9c7caca82f7a19cabef0b7c271c8a4d