Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5b50cc9137c5a2…

MALICIOUS

PDF

97.6 KB Created: 2021-07-03 08:31:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 64c728d73f015e6e9280ba5c147d3956 SHA-1: c4a1b091da9fc6620022faa7693570022e7d5602 SHA-256: 2e5b50cc9137c5a274533bb8c4c77d62cdc380821e7a157554949e824e5c2717
132 Risk Score

Malware Insights

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

The sample contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities to execute malicious code. The PDF also contains numerous external URIs pointing to compromised WordPress sites, indicating a link farm designed to redirect users. ClamAV detection confirms the malicious nature of the file, likely as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.1876

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/mdao9v432scc2ieckicrkt36nf/20844084131.pdf In PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609842fba7dd2---26837170683.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/o9s0fs8npmdag5fjed1bc2il4f/42640269700.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f3a0c77d8---14528949712.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/24241343326.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/zodedezetelujubofo.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c3557508a---xuzotopogiwituxugipobe.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607602c7dbf27---zinexijufivi.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/pajixejazosamalidigigep.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca2dfda2f1---54393371198.pdfIn PDF document text
    • https://estoniapools.com/contents//files/subugabumipanazis.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c6cc0ad44---xilewas.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608273fd3b9e8---fimilejela.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/genlh3tsp88q2r0r50olvnafo1/sasadagijipuguwapusuwo.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/6g7rjrrgg4tpn82dfph85487ic/78539889494.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084d9d54b7cf---67637070272.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/vuselumunuleriga.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16075ac5ab4c9d---turizarewafe.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3eac52777---25516081816.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c1e16a127---92568168958.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160cd4a04b46aa---69648520324.pdfIn PDF document text
    • https://synersys.fr/contenu/file/botopejinugawaxagopowatu.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/kuwupewitevuzixigolewukib.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/clqkdo0q0tts2hv21q1hfh5h84/40523421625.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/5aef674b9cf5df1117f96cbb7fd31fd2/misotexapojoginewosolepek.pdfIn PDF document text
    • http://cogersquest.com/clients/f/f6/f6194b381802d71b6842d6160e8859b1/File/dirabuxusanapa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=wasp+sting+side+effectsPDF link annotation
    • 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_off00014291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14291 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AA8 10524 bytes
SHA-256: 948ae7b585fe8a71321358288e7e6baf2ec62fea8115103a38f1a333bbe8e3ac

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