Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab5618f2e3bf2f58…

MALICIOUS

PDF

80.7 KB Created: 2021-09-05 16:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 68de1de4b5a40238c95fc68b74c172a4 SHA-1: 0a3d3f2aaadf75a2ae5804f39f4d695ffb311a4d SHA-256: ab5618f2e3bf2f58bb611ca1f983d1c438f95467cc62c4b8d765c028595492fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous external URIs and links to compromised WordPress upload storage, suggesting it is part of a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it likely serves as a lure to external malicious sites, potentially for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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://archism.ru/uplcv?utm_term=bebop+drone+2+manual PDF link annotation
    • https://edenestates.com/ckfinder/userfiles/files/73864085003.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/bgi51j4uuc7tgi119vsd6s70u7/xaxibuvusofigazixolugur.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/fatalejalafipoginafo.pdfIn PDF document text
    • https://beytarimcilik.com/admin/editor_resim/file/37387351420.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/f85eccd638ae567990d303f3cf15eb35/96114747073.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/13460540750.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c951288c698---kamejipibulupawupot.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2737197126---81804192844.pdfIn PDF document text
    • https://gionggiacam.com/ckfinder/userfiles/files/dagesenixokoxuk.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/508db8731c843d435744e5e1f3ac18aa/77774650900.pdfIn PDF document text
    • http://ponyomaru.com/files/files/93851611898.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/wesixilepofivatate.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021090323015070554.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/6ed0d559b741c0655f802213b89e3fb7/85585543587.pdfIn PDF document text
    • https://soosekszer.hu/upload/files/99007859087.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/lijelesesakonetukodedozok.pdfIn PDF document text
    • https://cnc-ar.ro/files/file/vovunetunavawozuj.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/depowojogaxez.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/2683a16dcbdf25b71b0b2f5363d56d74/bababonapalivuvad.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160c7292d23227---63893510334.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/62953329924.pdfIn PDF document text
    • http://mixmarketing.vn/upload/fck/file/88652169054.pdfIn PDF document text
    • https://luatsubienhoa.com/upload/ck/files/vemipajowosulidev.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/97801927211.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160722fd554b85---raxip.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609a715f855b9---lituxabuvonipatuxa.pdfIn PDF document text
    • http://ranchobg.com/img/file/53680837910.pdfIn PDF document text
    • http://muntepa.com/userfiles/files/33528979358.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_off0000da11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA11 10608 bytes
SHA-256: 6e5a7b7359b59e86b210c40bcbd83f193f79241f549622ec7b0469de4b0565fd
font_01_sfnt_off0000f210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF210 16632 bytes
SHA-256: a4a8d4f0e06ac938e365f45147de80e4daf51d0164f8f97d3f1aa87de8f4da0f
font_02_sfnt_off00011d0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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