Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d05b59dd759416…

MALICIOUS

PDF

72.0 KB Created: 2021-09-17 07:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 328940d96c90b514f7f129b8a546cfc7 SHA-1: 6c9b5ad10dadd967f09afd181042c6a544f3d939 SHA-256: 49d05b59dd759416848df76c07c3b80b2445225066fa8a47b692e699f69a42e6
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9234

Heuristics 5

  • 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
  • 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://pistant.ru/uplcv?utm_term=snap+snaptube+app PDF link annotation
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/161302c9606694---58126714503.pdfIn PDF document text
    • http://uitvaartverzorgingsindex.nl/images/uploads/70954212939.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/levefi.pdfIn PDF document text
    • https://cicasoftavukatwebsitesi.demowebsiteleri.com/upload/files/50124015214.pdfIn PDF document text
    • http://nbkhjc.com/uploads/202109/file/210905021147908416sexhpozvyv0g.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/45071139712.pdfIn PDF document text
    • http://stroykap.com/application/views/stroykap/userfiles/file/jebowovo.pdfIn PDF document text
    • http://www.koeru.eu/failid/file/pupokafi.pdfIn PDF document text
    • http://scarpatti.com/files/46099314077.pdfIn PDF document text
    • http://massiimo.com/piceditor/file/famitafaku.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16134173348ae7---sazeneligudemidiran.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/napogewudef.pdfIn PDF document text
    • http://bordahusfeldolgozo.hu/editor_up/77376901015.pdfIn PDF document text
    • http://ebrinteractive.com/userfiles/file/65227782940.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/zegomenebituxonedokev.pdfIn PDF document text
    • https://bomnuocebara.com/quangbasanpham/app/webroot/upload/image/files/54689031794.pdfIn PDF document text
    • http://cheumst.com/upload/fckeditor/file/rukiluvub.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613942d86e3a9---voguwamata.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/mezer.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/163172523383.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/18859014252.pdfIn PDF document text
    • http://rimini-portal.de/bilderarchiv/file/59167641283.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161300e677fa5d---guxapoxagowumukaredixaruj.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16142c3487d04b---widovijibotula.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/cfc81d631bcc42776a56127a58fcc3ec/rimazupuvoz.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d1f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F0 20256 bytes
SHA-256: a346cd4d28c86451146052ce0127d61999b94bbf9de7ea64385719787e8b3dd0
font_02_sfnt_off00010507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10507 1820 bytes
SHA-256: ef4c56b83544acc0eae329b123dcb13384a4443b8ee25b6b011fcec9f25c534c
font_03_sfnt_off00010d92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D92 10200 bytes
SHA-256: ff84c1c5df14a137bdbaf7d84df8075696f9ae54d251029dab47ca1dee646a51