Malicious PDF — malware analysis report

Static analysis result for SHA-256 1568aebf3c402cca…

MALICIOUS

PDF

87.2 KB Created: 2021-06-29 03:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f62b23f896ea08604c3d2d8f76156a4b SHA-1: d08f64cc4b4def98a8eea9fde4ed292044657857 SHA-256: 1568aebf3c402cca3b800e1743439c5b78be49f4a78380c3a9bcdedb83b86d7d
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It contains numerous embedded URLs pointing to compromised websites and link farms, suggesting a phishing or malware distribution scheme. The 'SE_CALLBACK_LURE' heuristic indicates the document may attempt to trick users into calling a fraudulent support number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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) or Microsoft license-boilerplate 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://pistant.ru/uplcv?utm_term=walk+two+moons+story PDF link annotation
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e035d0d8f4---45595674818.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/2133021323.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/a219d7c56775122f9de54c827c6b39c6/43861990428.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/13bca1000d18a04d0371ede4ecb45386/25339479979.pdfIn PDF document text
    • http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/15479680164.pdfIn PDF document text
    • https://mides.vn/images/ckeditor/files/31212888555.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e29d8752e---13024623791.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/panadekupesilatip.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/56ad8ca8b2bb692141f6a5755328ea8c/tebumefodokoxowowogujug.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5cf597792---numufuxukedunaru.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/70b1a6c528f5440ba25380d31a9cfc40/99822474551.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aa36d7b3a62---jonetatuladugoxasanoboze.pdfIn PDF document text
    • https://songhong.info/userfiles/file/dosijorewikaxakusotuz.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/22290611455.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/50568467582.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b15ed125bb3---29074380156.pdfIn PDF document text
    • http://au-coeur-du-temps.com/userfiles/file/mubatizuli.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cf6307ea6---wanomazemisebus.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/66157751257.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/embveap91hot7ksni4ecgo1slf/fabobolulagifiromevovu.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add9bc806dd---70631218427.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/disetemezogijomezif.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/d5b8404f78a7f104dd830b8446f50d9c/japufazimajewarusowuge.pdfIn PDF document text
    • http://americanewbie.com/userfiles/file/ruvifazusitojixap.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/3678ca059ivg04rrv0gmkgmdkn/1626122769.pdfIn PDF document text
    • https://mzlpro.com/web/img/podborky/files/74868236239.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_off0000f4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F9 16704 bytes
SHA-256: 0dd4f2a0917849c81bb49270871d7bc5cdf7fa62966ac4ff23ca208f5d730f2c
font_01_sfnt_off00012062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12062 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13879 10332 bytes
SHA-256: 4b529ffd579b578978b289b078c01f87aff31039574dacbcfaef454c3e191fc1