Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ae753d6e8658f3…

MALICIOUS

PDF

83.3 KB Created: 2021-09-20 19:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e9c18f7a1270781bc2a8f7f4e72a0ef0 SHA-1: dea1c9d5ba56a4816c316578460e5e2466414392 SHA-256: 94ae753d6e8658f3caf1d02ccc634c725917361dbfeefcc0fbea6b4fe5d52a28
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure victims to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://deverfgrossiercms.deindrukdemo.nl/upload/files/luwixiwidaviduserununaw.pdf In PDF document text
    • http://soeurs-scjboran.fr/soeurs/upload/files/99290088565.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210903103209_1lx2zx.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/ed993629c5b7d26894b1129a6d23c3e4/namasowatix.pdfIn PDF document text
    • http://polyacer-ecp.com/userfiles/files/20210908_112855.pdfIn PDF document text
    • https://saintarseny.ca/sites/saintarseny.ca/files/file/lekezuf.pdfIn PDF document text
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/89065535966.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613a16897f297---92827674972.pdfIn PDF document text
    • https://emtracing.net/userfiles/file/39662434218.pdfIn PDF document text
    • http://eastindiaspray.com/suvra/eastindia_spray/files/63743356262.pdfIn PDF document text
    • http://contua.org/userfiles/file/97058581864.pdfIn PDF document text
    • http://daehnfeldt.com/userfiles/file/dosinuwipuxerefixuf.pdfIn PDF document text
    • https://dp-engineers.com/admin/userfiles/file/51962008624.pdfIn PDF document text
    • https://plewmal-d.com/Uploads/files/vowedewenasobarawilog.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131b2d0209e2---44586089737.pdfIn PDF document text
    • http://china-miyaco.com/img/file/2021920102358.pdfIn PDF document text
    • http://rotarybrescello.it/userfiles/files/jexogunevamezigo.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/65638661651.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/96300726309.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/72762968980.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142ce8c2dcdb---22833444110.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16139968c68e70---zefavagusitojulo.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/bifuxowapov.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/cec1503cb59ed5083ab3aa2a87f12064/38379273073.pdfIn PDF document text
    • https://bold-iot.com/uploads/files/202109081211111754.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=block+restricted+calls+androidPDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e02a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f83c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83C 18176 bytes
SHA-256: 55725ae20add25f091eb6f02d021416e26d105fa3192133d7f601f90043f47a6
font_02_sfnt_off0001275e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1275E 10508 bytes
SHA-256: 87ef58af9b568d6fa443811c23632b96199f7f6701484b3b49248bceb67cbbfd

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