Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfe04555596005e8…

MALICIOUS

PDF

82.8 KB Created: 2021-09-01 11:20:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bf7f1db3f2dd340d9eb448320a2d9c97 SHA-1: 8f8d01d4bd41630ca0b447dfe887eabeee2a0c62 SHA-256: bfe04555596005e8b20ae1b1ea3dea40b209020d415545fce23bff2598fba51f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. The presence of a 'Clipboard command execution lure' heuristic suggests the document instructs users to copy and paste commands into a shell, a common technique for executing secondary payloads. Numerous URLs pointing to potentially compromised websites or disposable hosting were extracted, likely serving as download locations for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://inwebjor.ru/uplcv?utm_term=avi+to+mp4+online PDF link annotation
    • https://coastalstudio.com/images/main/file/59646869842.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.net/FileData/ckfinder/files/20210718_E0E4FB7EEE3223AE.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/o8ovloft1dbpnmbli1jfkjsp2c/74401266945.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/21927763484.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16113baf19aa8b---17196317381.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210506035007266.pdfIn PDF document text
    • https://clove7.com/userfiles/file/58906770587.pdfIn PDF document text
    • http://csc0512.com/userfiles/file/20210620102247_wlx5e8.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/8c87d39c3ae0c7e1144b88994b992acc/noterepiturazipo.pdfIn PDF document text
    • http://ozanatalan.com/iboard/includes/userfiles/files/nugufavu.pdfIn PDF document text
    • https://etimes.mn/uploads/files/56867536647.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/18bde2d842996c2959c1e839679e7c2f/subik.pdfIn PDF document text
    • http://actybrain-consult.com/Upload/files/33057052240.pdfIn PDF document text
    • http://korea-seals.com/ckfinder/userfiles/files/51406610769.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/qdv3mpvt52q014ef10gjr54s8o/82179600782.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16071031b7c267---katopam.pdfIn PDF document text
    • http://vanphongphamhienluong.com/upload/files/7002648962.pdfIn PDF document text
    • http://bjyhyy.cn/filespath/files/20210826010225.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a18811855cf---20629998176.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/56bb1bc65d07f7fd58f52bab8b5ba5d9/nufuziladu.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/94177753062.pdfIn PDF document text
    • https://shiokerbau1.com/contents//files/xekinewosusin.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/40581001297.pdfIn PDF document text
    • http://mahlkoenig.nl/app/webroot/files/userfiles/files/33913363579.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/tanowujaz.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1611c8a92980ed---fadunorexemosunoginu.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/muwibigekariwuje.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_off0000df08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71F 10108 bytes
SHA-256: 50b57a82fec5c0d3b9395c488d41d7af47598e1e59d7191dd19b391c6d90a93c
font_02_sfnt_off00010db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB1 18572 bytes
SHA-256: 722e0b079e226d256680218f4822848114b6d480f62f25b05162607813f0e181

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