Malicious PDF — malware analysis report

Static analysis result for SHA-256 e705ce0f1e5ff908…

MALICIOUS

PDF

89.6 KB Created: 2021-07-30 06:12:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c74a977b8217562fa6464d35f8c32351 SHA-1: 34c13bb2806761f3bed0399b0b513cd71806568e SHA-256: e705ce0f1e5ff90884221b6de9a13b0d947d2b87a9c783e4da8eabc05a8c118d
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to external resources, many of which are hosted on compromised WordPress sites. The presence of these links suggests the document is designed to lure users to malicious websites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8422

Heuristics 5

  • 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
  • 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://catamma.ru/uplcv?utm_term=residuals+common+core+algebra+1+homework+answer+key PDF link annotation
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cafed3d7fc---vuzijowusogojimemu.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/58141224317.pdfIn PDF document text
    • http://dh-cell.com/ckfinder/userfiles/files/48389800869.pdfIn PDF document text
    • http://worldnaturalfood.com/image/upload/File/pesuret.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609abd9a65f6a---kegulobenevorepanidi.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/fubostbuaancv0ppdeabardnse/28841773635.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/13j2urslsnenh947ospkmdq20a/jowezutofuwopedudobigijek.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/441351cebd6b004a0f5fbbb56816d339/99829514246.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/2115712715.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/21863e3c2d38540139e2bb95887660d2/tibugowil.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/ragizebofamunegutimavizut.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074cfd4b30a5---80765938239.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/b0a600f0a8142454feb3cad14365d0ba/33844426264.pdfIn PDF document text
    • http://adimhukuk.com/resimler/files/47789307489.pdfIn PDF document text
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/zaparorivibelesin.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160a123a2b8201---ruwapexik.pdfIn PDF document text
    • https://gomaihoa.net/upload/files/58932469411.pdfIn PDF document text
    • http://kangs78.com/clients/66216/File/22110222720.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160789c7498987---dajasapinuzusoraduzozamiw.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16257160497505.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/a17bafdb6c3f132ded98924e6891d54f/jojojek.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/83744687071.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/160887c0966051---sodivepebujatuporul.pdfIn PDF document text
    • http://bioterapiazabiegi.pl/obrazy/file/vakijo.pdfIn PDF document text
    • http://spostojow.pl/userfiles/file/figinobulemowufemon.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13339 18036 bytes
SHA-256: 430d4d04e7f3cc001917ee2a6f825bbbc87523f42a53ca35df93b0e9bb9b5519