Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2ede322c0bf4fb…

MALICIOUS

PDF

84.2 KB Created: 2021-07-17 17:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e8c28b0f950e0050cf84d97237021b70 SHA-1: 67e813e623ca41c9c1296a648536cce3cfd3693d SHA-256: 2e2ede322c0bf4fb5db374431f3f741c26c72687da00d04899582ce045f8d4bc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV confirming it as a phishing trojan. The document contains a link farm that redirects to various domains, including compromised CMS uploads and disposable hosting, suggesting an attempt to lure users to malicious content. No scripts were extracted, and the document body was unreadable, but the presence of numerous external links points to a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://108homed.com/userfiles/files/64858547502.pdf In PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7534325281e004c6835a692d81bbf8ba/53914395122.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021060908464173499.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/jifonerejiboreferisu.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0d56974bf7---vexudewuxofamufamuja.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160e660aa8e5a5---23346504615.pdfIn PDF document text
    • http://guchenes.com/d/files/delege.pdfIn PDF document text
    • http://wonikqnc.com/upload/editor/file/1623547737.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/d0cde58774b1fe79b5dadc80559913b6/35677490219.pdfIn PDF document text
    • https://coopinproject.eu/ckfinder/userfiles/files/doguxumulojonezumuwovilo.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5718c90ab---tegefiwozulafinawelanuwi.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082e51fd9688---24786854106.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160d99a6eefb44---9510707460.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/31937976969.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a10e63ca2---doberitomasipomol.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/bumapobija.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/83128412768.pdfIn PDF document text
    • https://personnelcle.com/userfiles/file/rutexizaderunarudajiwup.pdfIn PDF document text
    • http://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/9702169233.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608430d5a4cc8---soweb.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/iu7ln1ddau6bk6m9dqrnhvbq05/1210992177.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=greater+glyph+of+healthPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/b34c010900edf18fe0d6a6f1c132a44c/nusogunitoxupixubem.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_off0000e72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72C 17068 bytes
SHA-256: 38745d6fffc40caaf382cce9a1143ba29a8f9e00ee82505e9bc7090a2afcf25a
font_01_sfnt_off000113f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F4 10428 bytes
SHA-256: e5e0c3cb5aa6843e9184e9549f9416313849bfc9c65b8e91f15c408ea7b9a62c
font_02_sfnt_off00012bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1