Malicious PDF — malware analysis report

Static analysis result for SHA-256 965b00f9ce44e749…

MALICIOUS

PDF

85.9 KB Created: 2021-09-01 01:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b501e2a81c7a7e5908c5119953e1b1c2 SHA-1: 719a7664a952cfeb82f24b5abd8151ebe6322748 SHA-256: 965b00f9ce44e74991b5065bac688587de4a6d7738d9fa0e79679023addb2b0e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript and a large number of external links, many pointing to compromised WordPress sites. This indicates an attempt to redirect users to malicious content or phishing pages. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a lure or part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5695

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
  • 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
  • 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://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607330865d276---webababotoxovid.pdf In PDF document text
    • https://csn-alliance.com/data/files/silegix.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607def714c7d0---vatapilejimomatakexad.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/wesuguzolok.pdfIn PDF document text
    • http://keacg.com/upload/files/71092199153.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc5ae271a4f---jolijo.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/loxotekizevab.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/46vag9a1lg1aas8v5paq5b06er/31781019240.pdfIn PDF document text
    • http://thepnguyentran.com/media/ftp/file/tifakomodofelo.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/vafutibukisisulo.pdfIn PDF document text
    • http://imi.vc/upload/files/gibasemapi.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/dufadifukanowuwikovunidar.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/kenij.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4b31403087---67449766342.pdfIn PDF document text
    • http://hornets88.com/clients/56662/File/52853306508.pdfIn PDF document text
    • http://toyotarent.tw/FileData/ckfinder/files/20210618_7992F727F64CAE38.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d7315d5f6---notopakugilutekasefe.pdfIn PDF document text
    • http://thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/jovikazadawose.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8be2a5059---92270691377.pdfIn PDF document text
    • https://sinhadventure.com/uploads/file/72617906512.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ceda402eec3---safarasavanelezor.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797d74e657a---xogiwag.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736275c1bd8---53210849376.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=complex+number+theory+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001042f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042F 10828 bytes
SHA-256: cfc9be27c27ff26dd255a8b37b69270ec2cef63bbcbc090fedb6e4413c4d2034
font_02_sfnt_off00011cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBB 20104 bytes
SHA-256: efd31631b9e975754bfa2cc69d75063cfa793b7e789ead46b6cda2aaea120659

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