Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3769b20f61b8df7…

MALICIOUS

PDF

74.2 KB Created: 2021-09-13 12:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 835be6201a33800223685a160f5204e0 SHA-1: 929f16109c55b8912a4f6692586f433b527f742b SHA-256: b3769b20f61b8df746d9dd9504426c423bcbb115d36ad5b52594cf76a37c9a25
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous URLs pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the general structure indicate it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=hidden+secrets+of+the+topper%27s+mind+pdf PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a8af4acea4---29117676248.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/782bb37937d507cbeefb54b0d2e65936/posawinusonilutif.pdfIn PDF document text
    • https://wineart.online/userfiles/file/semotofifadukesukogatine.pdfIn PDF document text
    • http://rileyillustration.com/images/agency/files/31658085939.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/59791382106.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/lobogowukelebekedope.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/ferugatoxu.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161354e636630b---babebutedafumetetefen.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/51020635538.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-9-8/20210908005339649553.pdfIn PDF document text
    • http://www.nachtruhe.info/up/files/15190464688.pdfIn PDF document text
    • http://officinedesign.it/userfiles/files/banetuzutagilofekawi.pdfIn PDF document text
    • http://islenapuntos.com/campannas/file/xugixusesilitatixilugi.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/pujovosupujipasalun.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/vagibexisoponalojekowol.pdfIn PDF document text
    • http://phamtrangia.site/upload/files/1292665641.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/bopivuwediwewes.pdfIn PDF document text
    • http://24x7taazasamachar.com/assets/ckfinder/core/connector/php/uploads/files/4705166244.pdfIn PDF document text
    • https://ciela13.leaddeehub.com/userfiles/files/22078334203.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/tigugawukolejotuvoko.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/2741322075.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/12294828785.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210901_BC8A99550080619A.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_off0000bc5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC5C 17536 bytes
SHA-256: d9fd640b3a5392b697a43e2055dfcf61bb33b5c70de247796417d3a8a252cfe5
font_01_sfnt_off0000ea69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10280 10700 bytes
SHA-256: 569245a0f139aecd90148f1d313df5dabcb7b0f242ac54880de9be35ffc8f17e