Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4198f7294164012…

MALICIOUS

PDF

88.7 KB Created: 2021-08-11 22:22:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a59ca7ab1102c71ba9174cffd0304a55 SHA-1: 7255c00d1303fdef598dcd0d6dc65ad02f5f1534 SHA-256: e4198f7294164012a61cbe4f8223e3ef0eb02ce4dd7ef5d0dda2d777210e730b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • 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
  • 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://wastran.ru/uplcv?utm_term=flavorquik+microwave+popcorn+popper+instructions PDF link annotation
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/f57fcda76efad40e5e106d5e01ab3ebd/gixasufafiziwareda.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/ig3n2p93kmvjohve7laqo2c6d5/80294926962.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/7eb7622e2f83309ced4bbbece02e184b/18452117629.pdfIn PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/22802300999.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/xiruxasugib.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2086a024a7---wewipazinakizaxakago.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/51382351227.pdfIn PDF document text
    • http://gloria-eurex.com/lajatotepezo.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/79397284716.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/7cc53f32e4a8617109784dd3e3584d5d/nimoveromapenibumiwafapal.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/zorotelinux.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160bd233d5664a---jafuvovemurivimotabozora.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/3t3adpn0jc9ah2gj3vvdc4unn5/rufesabedozewegaw.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/6186855ecb9642a9df985405a4dbae46/41773981907.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070013863841---kexazule.pdfIn PDF document text
    • http://hak-al.com/resimler/files/41693636828.pdfIn PDF document text
    • http://muszempilla.com/files/file/zovirinerukowafeti.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/vajabunewazulosawaxexefip.pdfIn PDF document text
    • https://akproauto.net/nbloom/fckuploads/file/bifuzafezipiwipasiba.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fa994c8f8---rokudiles.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/94efe546160e1ff83531d453dc919fd6/zoxevazaxinupo.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/14284e94bc53998e9e30a1e02617280e/tavimobadu.pdfIn PDF document text
    • http://ottuk-e.org/userData/board/file/rusorus.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/bujojekakubatip.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/lunomugogatekewigad.pdfIn PDF document text
    • http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45434175059.pdfIn PDF document text
    • 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_off0000f501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF501 16932 bytes
SHA-256: 7ef1f9b88ae9fd1a2b9917814e773b67f5ccce43b7f5d56cd6a6f04c16365038
font_01_sfnt_off00012113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12113 11004 bytes
SHA-256: 688b7948d4ecec9e8e5e47c5874e0b29f3bf25c124b7a5fecc3dd7a4b8b484e0
font_02_sfnt_off00013ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1