Malicious PDF — malware analysis report

Static analysis result for SHA-256 86dbd78a2f7ec373…

MALICIOUS

PDF

87.8 KB Created: 2021-08-10 17:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3527bf916e7daea01b09d3e90b211148 SHA-1: be03a5e2d9ad56701f46005fed6242e9cc1b437e SHA-256: 86dbd78a2f7ec373fbc0af5712a8dc692113bef3a24aa5c2003f075f2ac5f32a
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to credential harvesting pages. The heuristics indicate it's designed as an MFA or payment redirection lure, consistent with business email compromise tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://garglob.ru/uplcv?utm_term=how+to+activate+pf+universal+account+number%2Fuan PDF link annotation
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/5qb7vhtr19ua3g1el486kgbse2/gefolen.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/xedobexufufidajasudew.pdfIn PDF document text
    • https://permargi.com/files/galeria/files/gapepupodirulafaxa.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/ef98dbaa7d63bac5d65f6c5eb03cf6ef/99387315540.pdfIn PDF document text
    • http://www.koeru.eu/failid/file/xeludakewaxazerar.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/27285745580.pdfIn PDF document text
    • https://talenthunt.biz/userfiles/file/kivan.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/detetosidiw.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ffd97d1b2f3---89591815906.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/mekegodovuguxevuwopek.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/410e20d3af61c91a0c6fa92bbb8e543f/29444897627.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/pikebudugawev.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a627dd3ffbf---guzejudegat.pdfIn PDF document text
    • http://misr-consult.com/userfiles/file/tazowidewuvifodigiko.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/hqm4igkfpshvr7sd4kv3k36j37/bemilemusenovazevobixetof.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tevefufavi.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/zukotepitorusu.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bfb97a13b7cd3acd3f7d90af4ffcceef/sevijewufobegaxumuliwu.pdfIn PDF document text
    • http://clase86marista.com/clients/25276/File/77360464245.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/kedunafuvaxupumu.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870d12668bb---godororun.pdfIn PDF document text
    • http://aahsclassof1978.com/clients/b/b6/b6117739535924054831d33ecd54b00a/File/gosumilatiwomom.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/57010577742.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_off0000f17f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17F 11056 bytes
SHA-256: d7fe93b31a3987e83e012adfcddc0767deabfe051fd70f528f255feb6864a41c
font_01_sfnt_off00010b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001232e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232E 17492 bytes
SHA-256: 20497ec9bc3b294e035caa1e2aa84aa323438825b8af26f4f8704c73fd3de602