Malicious PDF — malware analysis report

Static analysis result for SHA-256 65fd2e62540ce0ca…

MALICIOUS

PDF

71.5 KB Created: 2021-09-05 00:53:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5d994770005040dd02b34da3a39b58fe SHA-1: d434d0600883a40e50c156d7d8294a83e12949e9 SHA-256: 65fd2e62540ce0cafdaf50953e0c3932f8c0530c79d70b5e93c437ee56269b16
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the PDF structure strongly suggest this document is intended as a lure, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ketchas.ru/uplcv?utm_term=international+business+law+august+pdf PDF link annotation
    • http://ocean-ex.com/images/blog//file/11527267295.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1606f91f956839---fowurafage.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/74215322984.pdfIn PDF document text
    • https://www.tahitotfaluovodak.hu/ckfinder/userfiles/files/81022426639.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/22b567447ca3ea6ed51c6c4dc2929538/lutevefipisaparu.pdfIn PDF document text
    • http://studiofranzoni.eu/userfiles/files/tusovo.pdfIn PDF document text
    • http://georgefamilyreunion.org/clients/86186/File/16333060415.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/vusinidogilikafuketadun.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/kupefuzeren.pdfIn PDF document text
    • http://www.vandiestbrandstoffen.be/uploads/files/36658069071.pdfIn PDF document text
    • http://gsxr.hu/userfiles/file/76013096030.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763288b9952---63569464582.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/b030799401cc005c90f19665b6fcdc99/gawafegupimoxene.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/61240147449.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/36c96db0398e3d2aacd0dc1e09f5265b/padeponopibopepotu.pdfIn PDF document text
    • https://nbretail.com.vn/ckfinder/userfiles/files/jegubisusegeporikonoben.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609be287b24fa---vezafaxadupuxexub.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/2a13badff777bcaa75c6e66e653d5646/pelinidepinawiwufasowuw.pdfIn PDF document text
    • http://ccshecea.org/upload/files/nifoxikisozezojopisu.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608c25a1f2bce---64592417245.pdfIn PDF document text
    • http://bjsixiang.com/jingkelun/userfiles/files/20210903032817.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4FF 16512 bytes
SHA-256: 975892398d670d6551c41cfb770b364f9fa9360a405df300897ecfec35046b9e
font_01_sfnt_off0000dfa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f7b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B9 10948 bytes
SHA-256: e2672ce98deba0de65c6de1f360206b3c8fdb45aa51a63197ca0941cb6744a17

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