Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d8d375086722b1…

MALICIOUS

PDF

82.0 KB Created: 2021-09-05 07:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 54f101591f2964b80d4f9c7be0b9b822 SHA-1: 5a284ccc18c33ee911a1575b21d0825df4315a03 SHA-256: 09d8d375086722b1a361789b3844adc52ab0c2ba99a9c92f51edb7dc915dd1fc
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm or redirection mechanism. The presence of 'wkhtmltopdf' in the metadata and the 'SE_LOLBIN_RUN_COMMAND' heuristic indicate potential for command execution or exploitation, although no specific scripts were extracted.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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 http://luvnchrlysenglishtoys.com/clients/861429/File/nifubule.pdf In PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/3a50408b59f1d56ec645cddd46e8d8d7/58632523225.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/4ekfaaqnuhk543ojanodf9osaj/31104292233.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b75c3c0b297---50271923634.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6c25398b3---vuvoraxiwowoluduzasezekav.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/2603199700.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/60754348813.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/31017529746.pdfIn PDF document text
    • http://yanartekstil.com/firma/files/bidetupexafonug.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/kogawe.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/705d12b561669768027a207c341dedd4/puluruleviwimuvuzokeji.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/fukozis.pdfIn PDF document text
    • http://szalkasszorutacskok.hu/app/webroot/files/content/files/dotakasavulonojape.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/43a3a7ea4a2bb63b5ebd83fd8684c325/87199168318.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/vd3mkufql6og8kkj5817347dvs/rudavawopumako.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/debipetux.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/f7tsk4rtvdm2o2a0v10ipcuiv5/fewujelolemivikotokigal.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/66605538481.pdfIn macro / runtime command snippet
    • http://cl-pub.com/files/files/29219439093.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dea89b77042---rusasevuwegizeniminoz.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/nanagogufusidipunarow.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73fcae65b1---15720757262.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-8/20210508230058576642.pdfIn PDF document text
    • https://wyslijpaczki.pl/app/webroot/files/userfiles/file/rumif.pdfIn PDF document text
    • http://www.sunarozlem.comIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=service+manual+honda+accord+2006PDF 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_off0000dd72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD72 11020 bytes
SHA-256: de4d4968bff7e7334b5e6f5c97d3361c7811cf3b1b77557424f696ec3f019ee9
font_01_sfnt_off0000f6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF6 16936 bytes
SHA-256: c2d2a641def3b9bcd08642c6bc025e551e660348dedb3338ffb37e9289e9600b

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