Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc9afeb9e39feb4…

MALICIOUS

PDF

108.6 KB Created: 2021-07-03 09:36:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 869ce2fdebd99aa3404564244b6af067 SHA-1: 94b964b291ae021599500053c1e0edc1e654889a SHA-256: ecc9afeb9e39feb467ccaed19278ac098341d785b55958e9dc84f53b91b78638
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous compromised WordPress upload directories, suggesting an attempt to distribute further malicious content. The presence of multiple PDF files hosted on these compromised sites indicates a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/ea52738eabdfafe35d383005ac2b5c09/57809765442.pdf In PDF document text
    • http://stasta.com/userfiles/file/lulapigaf.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16099d58ef1ee1---72532138196.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/3bb3c71c6d54203e4ae1845f01b506d0/muranujotodarewefidesi.pdfIn PDF document text
    • https://porterbrothersltd.com/app/webroot/uploads/safadajeripabuta.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/an9jlpgambkqp12eop3s8ka3s6/lemasedanoroze.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/9bfap1c5rcr7fffod40rqpdrhs/24738471817.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/00a45616fdbc1fdec8793475ec607a37/kokawijabobavenem.pdfIn PDF document text
    • http://cornucopiafrederick.com/uploads/files/14023933583.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7558c5cdf---xinuzo.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/66b0b649bed8be86fadfcd3352f43cfd/4326870926.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/dcefff2a98402ac45c9390a79bd40d4c/19494264861.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608228c17d79a---68787794298.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7bee891c21---wokuwiresurex.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/979fe82f0a0ef400eba69dd26c0f2c46/46892831195.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee8ec00b9f---85579684954.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/gugediduxuduvesuburelapo.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/xuxivemexiwewago.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a48bd532321---mevadefoferexefazeg.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202106111857.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b9423712e---pusaturituselupag.pdfIn PDF document text
    • http://canadanur.com/resimler/files/42823544865.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/eb10a43cb65d9c994b72527dd7e1dd03/nakowelaza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=ecommerce+template+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_off00014a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16242 10260 bytes
SHA-256: c21a5b1cc81f0aeafeba82b334e0f2e57d3a883cf3ba0e572c33da8d2fab4c2d
font_02_sfnt_off00017953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17953 16840 bytes
SHA-256: 73f385b0a287e3285f681eb053e3c5a1d643cb5f4e7e2789511c6d51e55391c6