Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec77a625039472f2…

MALICIOUS

PDF

72.3 KB Created: 2021-06-29 22:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 5a08eb7fa47e6a27148c9f551daab60b SHA-1: f0966458338bb2880b882d9afbac72f2333500b2 SHA-256: ec77a625039472f2a194cc47fa0c2f635e357cf4d1529947076a5a2fea742a8e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting domains. The primary purpose appears to be directing users to external resources, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://smidgel.ru/uplcv?utm_term=success+at+statistics+a+worktext+with+humor+pdf PDF link annotation
    • http://learnazia.com/fck/imagesfile/gazibixagopedoxalavaruz.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160acf75249226---79852697935.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c09f1b67e1d---leranakizetunolugoxuxajod.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a53c2aed300---93904844469.pdfIn PDF document text
    • http://rowanfamilyreunion.com/clients/28915/File/zatixoxoraguzupefef.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/k7s8gr2ljhp17rtvscdqditroe/75383237392.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/datewajepuzadowudotifunop.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/xulufafadefavo.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d2261ee8b---detudefekufoti.pdfIn PDF document text
    • http://dzwigipoznan.pl/userfiles/file/83186550303.pdfIn PDF document text
    • http://velo.hu/UserFiles//file/37164041666.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/5e4c4cd8a0bda8feebc4d2b972b43912/82774260453.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5d0880cf1a---56204547682.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/l6n0cp0h13j5ap61p326q46l23/dunupem.pdfIn PDF document text
    • http://efrex.cz/files/file/47519921253.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/87451493054.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c77350eb576---tifimoporuxigizaz.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/c6f49719cf9e4d6d61f71a0191d670f6/76347781364.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/17606245739.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/82519088953.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/zadefuwifilamujegis.pdfIn PDF document text
    • http://adveotec.com/img/file/tufakulovogeritazaw.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/bapaxujesimevegakazage.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/98839880847.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160a858956f3b1---68195825523.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_off0000b8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DB 11192 bytes
SHA-256: dffa83de74c660c5a7ffbec9f21668be620e983848a5ee28a9095bd3444b5c38
font_02_sfnt_off0000eb27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB27 15908 bytes
SHA-256: 6407df24db0fbf953801527e8fc790ee56031a40211cc8053ce3d9071d590d89

Open this report in the interactive analyzer, or submit your own file for analysis.