Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f7377dd15cd098…

MALICIOUS

PDF

104.4 KB Created: 2021-08-06 17:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8bfbb0673d165dca20787b41cb3f8c34 SHA-1: 346a2714f6b1a32dc6b6c0cf1d3b8c8647768dbd SHA-256: 90f7377dd15cd098cf5ebfe1629fa6c15f4e7ba4f2cb76fbe138c6de395b1752
176 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to IP addresses or compromised WordPress upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading further malicious content disguised as legitimate files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://157.230.241.115/image/upload/File/33818755699.pdf PDF link annotation
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/c8057a36a2637b3769d1e9c8186dd666/gujizamofixajatefefo.pdfIn PDF document text
    • https://successalpha.team/upload/files/93654892552.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16235747508517.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/1177f86e57292ec3b34651c250bcc47b/tolesexago.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607db60d39a5d---29765837561.pdfIn PDF document text
    • https://emmaushuis.org/pages/5161960363.pdfIn PDF document text
    • http://sunriverps.com/data/editor/file/86902991050.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8e40a3986---86822475395.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/bk1j5f5odtcmr9psjd9se0st7q/rawewesubokofegizaw.pdfIn PDF document text
    • http://nguoigiupviec99.com/webroot/img/files/sawogovoke.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/93320242298.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/11442745af76781abef040d3cfaeff68/vasagopuwidifusizaduk.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/28023181185.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/dotudogowifosesasijeguzeg.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/viguvufojadupazizuweme.pdfIn PDF document text
    • http://bomtvplus.com/data/board/file/20210513193214.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/vokikejulifatovitam.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fbf6ef2d3c8---45075594740.pdfIn PDF document text
    • http://yenidenyuzlendirme.com/ckfinder/userfiles/files/25981386950.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/dubujoxotoxewuseli.pdfIn PDF document text
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/n6qkps6pgvbaocir2ghhk4847n/kavegatubagixowakoti.pdfIn PDF document text
    • https://mimpishio1.com/contents//files/61193615877.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/dc3671c9f495aa2567afd10f2938e18e/15665769382.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=advanced+lead+guitar+lessons+pdfPDF 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_off0001328f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1328F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AA6 10940 bytes
SHA-256: 88c2bc0f10d424e222354a7c779ff226580be8f0443ccdb8a2608cbfa17a9794
font_02_sfnt_off000163f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163F9 17864 bytes
SHA-256: 8c709dd2b87141998a80232d4f22ed45df32e040975bae0967495636b200401f