Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7d99b6167d2a83e…

MALICIOUS

PDF

386.9 KB Created: 2022-03-10 21:00:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-28
MD5: 0ff0e771b4e8c6acf3430c428ef77567 SHA-1: 7c508377b1514c23236add567b215ab74e80cd09 SHA-256: c7d99b6167d2a83e6693575ac13bd0e758cbdf961b3870f4337dccc169e2ccbc
246 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7789

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://cafij.co.za/XSRYdR1H?utm_term=crowley+lake+fish+camp+report PDF link annotation
    • http://vit-physio.de/file/2355933323.pdfIn PDF document text
    • http://www.ximangsongthao.com.vn/app/webroot/uploads/files/napapidaputufojewipel.pdfIn PDF document text
    • http://yuli-china.ru/d/files/tomotadipudixe.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/a6f04b667edd139a6d70f0516eb2f51c/79961658213.pdfIn PDF document text
    • http://creacionesfullpack.com/kcfinder/upload/files/94691553655.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20220212075658.pdfIn PDF document text
    • http://ambulatorioveterinariopisillibertozzi.eu/userfiles/files/93798501310.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/50155614778.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/801d2391d22432bc77adbce18b545a89/ximadokugefojikupu.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/1mmc9nkgdr0d5dvai9h4p8s4s3/jexivabagenasulupafovupe.pdfIn PDF document text
    • https://mimpishio1bet.com/contents/files/3495502868.pdfIn PDF document text
    • http://hastensandbreakfast.nl/userfiles/file/dipudimijuxu.pdfIn PDF document text
    • http://fygl.net/uploads/file/060253018974.pdfIn PDF document text
    • http://elitacasa.it/images/file/73073116765.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/pepebuwoboxaxunu.pdfIn PDF document text
    • http://avanti.pl/userfiles/file/1228404293.pdfIn PDF document text
    • http://vintagesilverrose.com/admin/ckeditor/kcfinder/upload/files/13362383758.pdfIn PDF document text
    • http://jedwines.com/cmsCart/upload/file/91028291426.pdfIn PDF document text
    • https://jensbrode.de/files/file/28732540171.pdfIn PDF document text
    • https://jurvamartin.com/userfiles/file/segobokivef.pdfIn PDF document text
    • https://triatlonshop.cz/userfiles/file/xojunusiluz.pdfIn PDF document text
    • https://schodyperfekt.pl/user_upload/file/lijopumivufo.pdfIn PDF document text
    • https://divinehm.com/ckeditor/kcfinder/upload/files/94551906983.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/162010f29246c3---lifofenuw.pdfIn PDF document text
    • http://bacvietexpress.com/upload/userfiles/files/selunejo.pdfIn PDF document text
    • https://oriolefashion.com/ckfinder/userfiles/files/20884912883.pdfIn PDF document text
    • http://www.groupkms.com/ckeditor/kcfinder/images/files/11750633276.pdfIn PDF document text
    • https://sanidom.pl/img/file/pipopomubijifuluguwimigud.pdfIn PDF document text
    • http://www.federacja.krakow.pl/uchwaly/kcfinder/upload/files/8670674829.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_off00059c1f.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00059c1f.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00059c1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59C1F 10964 bytes
SHA-256: 306c3f934d446eb438765d62e900f3d748522a083a7c3431b78cb4cfc10dd173
font_01_sfnt_off0005b5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5AF 18272 bytes
SHA-256: e99cbab86147810649c6d15e3836a90d2ff5c4d046a632b27d247049b184cccd
font_02_sfnt_off0005e58f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E58F 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9