Malicious PDF — malware analysis report

Static analysis result for SHA-256 793c8bc40fc6c053…

MALICIOUS

PDF

69.8 KB Created: 2021-10-01 23:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: 718f9d233c42b34d9e5993b32e6bba45 SHA-1: 250bdb56743885d431c84d39aab3e544200ebfd8 SHA-256: 793c8bc40fc6c053b09cf1bf56c90609731f9ad95f9d0531179e1527638141a5
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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.
  • 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://synerhu.ru/uplcv?utm_term=youtube+to+mp3+flvto+apk PDF link annotation
    • http://kohaz.hu/files/file/12180516931.pdfIn PDF document text
    • http://smartdeal.pl/files/upload/files/nedevuwasok.pdfIn PDF document text
    • https://fortworthdental.net/cmsCart/upload/file/pobewu.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614bb710418f1---tiveluvoderukuxedujiwafis.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e5ae588630---7227820488.pdfIn PDF document text
    • https://eternalbliss.net/file/31866819573.pdfIn PDF document text
    • http://dasbluemchen.com/79368592517.pdfIn PDF document text
    • http://ooexperience.be/assets/Image/files/zowej.pdfIn PDF document text
    • http://www.abcklima.hu/data/editorfile/ripebofimarabape.pdfIn PDF document text
    • http://llux.vn/uploads/files/mamowijedum.pdfIn PDF document text
    • https://congnghieptauthuyvietnam.vn/upload/files/nipijomodoborukaxaxi.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/faxevodolifamudagu.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/72006883065.pdfIn PDF document text
    • https://ssekolkata.com/ckfinder/userfiles/files/maxiziruwiralomas.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd188815b6---kenejuwakezirudi.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/7522ae6fa47f2ee9cab982f3426e6245/wepifenosow.pdfIn PDF document text
    • http://elard-group.com/ckfinder/userfiles/files/besunodusigazatonedakix.pdfIn PDF document text
    • http://zoop-tech.com/ckfinder/userfiles/files/nulobelalonemamo.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/9eed223ea795890605cd6bf41c0d1370/53021159680.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-9-4/20210904033036868275.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/nifamiketuwidixer.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/df06cd2e9573f563aa42affd6641aee4/31557257929.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/wusefimuwiganemoxer.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_off0000b162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB162 10608 bytes
SHA-256: 75353b17c2d09f521000720106f9841268d8f029ef39dae7e691576004dd05ea
font_01_sfnt_off0000c986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC986 15204 bytes
SHA-256: 211418230f26b6993843b64652ed39ef8447f474e512f36468797f569fbc7dfa
font_02_sfnt_off0000efe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1