Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ecc2fd3d6ec78ca…

MALICIOUS

PDF

84.3 KB Created: 2021-09-01 05:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 415370be00761a85aec1c0332af85bcc SHA-1: f7ef98de9954ed8dadaee0ea20bbaa72a9b2aaa8 SHA-256: 6ecc2fd3d6ec78ca33bb6cfa59cf0c8ac73f0922353c6f91f8528374e93471f4
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised CMS upload directories, specifically WordPress super-forms. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of link farms on disposable hosting and compromised sites suggests an attempt to distribute malicious content or phish users.

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://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/v5eelpil1bv1u4f8fu7j405muv/nazatujube.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/47d9fa57f2f6803364da7112f299e7fc/10813792308.pdf
    • https://baatco.com/ckfinder/userfiles/files/mupusuriwelerolaxeninubaz.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/35d8094427e6d3cec61de36917aa3d2e/sonigelefedupunik.pdf
    • http://anvlaw.com/userfiles/file/77951505919.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/77svn6hdorj9k7dmb0da1rk813/18313867580.pdf
    • https://floridainvestment.cz/files/file/xixinilaleweserudazofu.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160800583905ca---vufinijonuletorekireben.pdf
    • http://ctkupavna.ru/upload/file/91487218405.pdf
    • https://www.hosotte.com/ckfinder/userfiles/files/sibamadumivegodi.pdf
    • http://fine-cottage.ru/userfiles/files/pemupukat.pdf
    • http://chinawin-consult.com/userfiles/22886011620.pdf
    • http://himalayakebab.com/shipinc/userfiles/files/21681581277.pdf
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/14000008946.pdf
    • http://dorisemitchell.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pakatukinuvikovemixusowub.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/10257272651.pdf
    • http://apricomm.com/userData/board/file/47018849431.pdf
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/79958979938.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9ddb0dfea---42743059353.pdf
    • http://madmojo.com/fckupload/file/najunumidizevep.pdf
    • http://bienbao.net/uploads/files/xujiboxerodizi.pdf
    • http://newbusan.net/FileData/ckfinder/files/20210813_294CFE1316636F3D.pdf
    • http://bartuceviri.com/userfiles/file/78453356107.pdf
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fa8fed938---sagetawonemulu.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/g9jfn6q2ndrltb9pufagjo3lfo/woxalodukupuj.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=lilith+and+mary+magdalene
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6c1.bin
56bd318b2fa3d55eafd520d1b00a10556277af0de58c23dc50b53dbd9b4f57f5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C1 17540 bytes
font_01_sfnt_off0001142a.bin
6591287185d96a007b1b0ec7a1b3535e4ba5bbacfed116fe56c860c83f0d390d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1142A 10476 bytes
font_02_sfnt_off00012b79.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B79 16792 bytes