Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8ba2ada1dfcab53…

MALICIOUS

PDF

78.2 KB Created: 2021-09-24 04:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 80fe49130411c2477dc02a7fc703b5fc SHA-1: 1bf05dfd43ac62f8bd69e1f8b8fb57ee146ed208 SHA-256: a8ba2ada1dfcab53bf9f40bd4d7589a161f5fcdd0b4e6ef897905616684a37c0
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to numerous disposable domains, suggesting a phishing or scam attempt. The embedded URLs are designed to redirect users to potentially compromised websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://anbuadidravidarmatrimony.com/ckfinder/userfiles/files/nazezoti.pdf In PDF document text
    • http://hbisan.com/userfiles/file/68880942982.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/xesewep.pdfIn PDF document text
    • https://rhuyscampingcar.fr/images/files/motobesikaxotuje.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/0klphfq1vd6a07dcnf2i01r6qj/3245390791.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8l5e5bhe3ihopsa4spajlm85j5/tibuvuniga.pdfIn PDF document text
    • http://philipp-haberland.de/images/upload/file/fejesipidagokojepuse.pdfIn PDF document text
    • http://circuitvietnamcambodge.com/hinhanh/file/97337950538.pdfIn PDF document text
    • https://alubiasdetolosa.com/files/galeria/files/zusasijekuwusakove.pdfIn PDF document text
    • https://susta.vn/userfiles/file/7909039545.pdfIn PDF document text
    • https://darkoyunpin.com/calisma2/files/uploads/59210603619.pdfIn PDF document text
    • http://marinaxaraes.com.br/ckfinder/userfiles/files/xupemuvetaxuralapototo.pdfIn PDF document text
    • http://1carl.com/userfiles/file/13039140142.pdfIn PDF document text
    • http://80tner.netsociality.com/upload/files/40746665191.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133dacb28213---zaxubanites.pdfIn PDF document text
    • https://pensionradvanice.cz/res/file/91856652116.pdfIn PDF document text
    • http://goldmustang.ru/files/files/44355111028.pdfIn PDF document text
    • http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/gazek.pdfIn PDF document text
    • https://telorgabus.com/contents/files/90224841519.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210908074922.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/605e11250ecb1c326d8bc69d398bcd50/gosafavixewuzizosaxuba.pdfIn PDF document text
    • http://caerulumpharma.com/upload/files/ladinubezogofejuliropedis.pdfIn PDF document text
    • https://12shio4.com/contents/files/85867117398.pdfIn PDF document text
    • https://businesslife.com/content/files/piretevux.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/ruvulopamosak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=watch+trolls+world+tour+online+freePDF 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_off0000cb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB70 10752 bytes
SHA-256: 07758a770b232a1789e0236ddf8d2d956aed5efb6c8385fd0518922b2872a089
font_01_sfnt_off0000e435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE435 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC47 17848 bytes
SHA-256: c25818ddaf8ca47d50d817f9bf61adc50f187bf7d9337e9a9e2e1c0de4027bd1