Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d8aaf0e7cde2cda…

MALICIOUS

PDF

82.0 KB Created: 2021-09-02 09:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3d94635720a321b8cfdf2c60ce922664 SHA-1: ec36aef1a44da50b17d6b9cb18d5200e6727f109 SHA-256: 1d8aaf0e7cde2cda9e3f7b03ed0a54c7aca3eb64299431db55fb7de5627f1886
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised or disposable hosting domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://inverpalmas.site/aym_image/files/68360094702.pdf In PDF document text
    • http://tuzvedo.hu/elemek/file/4883263662.pdfIn PDF document text
    • https://nslogisticservice.com/userfiles/files/15794414316.pdfIn PDF document text
    • http://franklinbristerharveyfamily.com/clients/a/a8/a8910385c57dfddac3c6311e2bd1422e/File/8444803924.pdfIn PDF document text
    • https://soosekszer.hu/upload/files/tipotemoremasutu.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/161255e6d97cf9---resitalip.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/walorenikaja.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/51945895767.pdfIn PDF document text
    • https://nguyenvanhuongloc.vn/app/webroot/files/images/pages/files/33359954800.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f3a45fd1a---rezivojixe.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/inubehams3k568v4h3icp4ob26/20408495085.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/wozirakeberizu.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/60328531091.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16125af00d3374---85026346030.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c62f21476ce---wajaxisubarazisemigejiwe.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/pigodut.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/18880125501.pdfIn PDF document text
    • http://wijnhuis-vaessen.nl/site/data/ws/files/55473590567.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd337a9ce2---nadugira.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a866fe2fd49---81043964761.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/34c7a3e2b2086ae127acef6c894266fd/jixufuxunumiperawob.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/33481325158.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=tor+browser+for+pcPDF link annotation
    • 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_off0000de90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE90 17092 bytes
SHA-256: ea1f94bb8aced1f7cb0e5766be8e348922252e0993d1a3e542995584e6e8f786
font_01_sfnt_off00010acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E4 10160 bytes
SHA-256: ac80206dd6266c57f6167012955466442f4a044781c660219fe36318a3172647

Open this report in the interactive analyzer, or submit your own file for analysis.