Malicious PDF — malware analysis report

Static analysis result for SHA-256 f31b0e6a7c1e8a67…

MALICIOUS

PDF

79.6 KB Created: 2021-08-21 03:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c9d6404566d4dbafe0bfed84648c6f71 SHA-1: 4d2820a92687433aca84537952c2ab5f597845ec SHA-256: f31b0e6a7c1e8a67a5db61da768b0f46752e8f6d47640d43be70859168920973
124 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs that point to various websites, some of which are hosted on compromised CMS platforms. The ClamAV detection indicates this file is a known phishing or trojan variant. The primary function appears to be redirecting users to potentially malicious sites, possibly for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.2479

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://philabc.ru/uplcv?utm_term=playstation+5+console+release+date+2021 PDF link annotation
    • http://champagne-marc-chauvet.com/images/files/xosevapufelogufo.pdfIn PDF document text
    • http://xn--kprq5pvqklteonubj6c.tw/CKEdit/upload/files/7354172567.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/dl1cqvej60gstakdptfj82fc8f/48766926078.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/noluvagirima.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074115ba13c7---forurixazuxu.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb355bdcb0---33930797243.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1611890e69cd93---lokamejeriwowizef.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfc1c785c5---mafitipulodidemakodidafi.pdfIn PDF document text
    • https://ahha.az/userfiles/file/tomugalopomure.pdfIn PDF document text
    • http://cerrutistudio.eu/userfiles/files/97564602260.pdfIn PDF document text
    • http://mujuerp.com/uploads/ckeditor/files/20210527165852.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/17528583993.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608820ec00554---muzim.pdfIn PDF document text
    • https://energooptima.hu/upload/File/lebapasaguxipakife.pdfIn PDF document text
    • https://srmresidences.com/images/bulk_images/files/xurozokexikaweluwijib.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/gewafujezeruliruxujoburi.pdfIn PDF document text
    • https://trsoftyazilim.com/genelresimler/file/wotowitag.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16072f9720cdf7---36835174147.pdfIn PDF document text
    • http://tieuhocsongphuong.hoaiduc.edu.vn/ckfinder/userfiles/files/73282735264.pdfIn PDF document text
    • https://beytarimcilik.com/admin/editor_resim/file/giziroxur.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/gozawitofugugumi.pdfIn PDF document text
    • http://ashioke.com/images/library/File/65158687308.pdfIn PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/92929877962.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a2220b5b2---93833407290.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/sarelolakiwojoxenib.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/39235302957.pdfIn PDF document text
    • http://srlamn.com/clients/0/00/00e84243199fd86ca7c15d66a0237eb0/File/xapuzibanodar.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_off0000e7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A4 17140 bytes
SHA-256: 04342505eee6a1ef744b05bc43767878e81ed9cd2f47cb5b7725599a56f7242b
font_01_sfnt_off000114a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1