Malicious PDF — malware analysis report

Static analysis result for SHA-256 a03976ec30e7a5ea…

MALICIOUS

PDF

79.9 KB Created: 2021-09-02 15:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 63d033a52dd936d956bb9dd1f060a232 SHA-1: 7316cbe733bd1569595ad681db89d21cda4ceedd SHA-256: a03976ec30e7a5eaa90531d8e5d1ac3df5451477a8ca91ee9253fbbbbc6ad3d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/76da1be2ccf185a84f49e203d443bba6/savigapajonisakenavas.pdf In PDF document text
    • http://omatsuri.kr/data/userfiles/files/36717518917.pdfIn PDF document text
    • http://uspeh-kursk.ru/ckfinder/userfiles/files/fanavezofenejonudoso.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aa73b26ec5a---70763684581.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/d76434c2b14d2e1522f2b065a475a431/23092184134.pdfIn PDF document text
    • https://naoshima-habitant.com/20556155560.pdfIn PDF document text
    • https://murten-hotels.ch/userfiles/files/308726925.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/72422282628.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/4837099b93d8b707bce67994b7505364/bokiwadigakopu.pdfIn PDF document text
    • https://lose-weight.tw/upload/files/1737063508.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/b536d39e4656307224c69b9ea1a36d2a/larewafinuduju.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da36d312fd---67891469492.pdfIn PDF document text
    • http://qca.ch/userfiles/file/40999887534.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/1qhrqkotqrk3vb9md8uoaeks25/78664843333.pdfIn PDF document text
    • http://studioghittigargnano.com/userfiles/files/vavuwevidibozo.pdfIn PDF document text
    • http://huiking.cn/uploads/file/18033118215.pdfIn PDF document text
    • http://www.sanjuktabanerjee.com/fckimages/file/27024139495.pdfIn PDF document text
    • http://meyanko.com/userfiles/file///wamodapitojagix.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210812_4B09D24D374DE314.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/r6eg6vip4f4ps2lo8vbr99tovv/75017984814.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/49d8379e56c950f24afb987073e0a3e0/vovuxulexoraj.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/824da7e2deead3757eca7341358c6e0d/31680072951.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160f96212b447a---52377404817.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0b09730fc---2505534331.pdfIn PDF document text
    • http://salinasouth.com/clients/11073/File/23274420372.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=gifted+hands+pdf+by+ben+carsonPDF 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_off0000d22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22A 10964 bytes
SHA-256: dfe88c30f45c4adbfca8810ca693023ae2f22d73631e60ffc6f880fb95ee3fd8
font_01_sfnt_off0000eb63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB63 17664 bytes
SHA-256: 9e00e64fb49564d1fa078638c0b6a13ee3d0657b428916e7e9ee242886fcd247
font_02_sfnt_off000119b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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