Malicious PDF — malware analysis report

Static analysis result for SHA-256 334de29500aabffb…

MALICIOUS

PDF

86.0 KB Created: 2021-09-06 15:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 760e17c8a2af8ad033e036e9635044b0 SHA-1: 61d01c6b3d21071ac175b31c4092dd859b8df256 SHA-256: 334de29500aabffb6c337c243b451cf15841c818bcd3ce18666165e2bc522a78
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm that redirects to various domains, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting an attempt to obscure the final malicious destination. While no scripts were explicitly extracted, the nature of the link farm indicates a probable intent to lure users to phishing sites or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://fvv-hohenfelde.de/sites/default/files/files/wololamakomujege.pdf In PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73641af3fa---losojowasibabomutuwebu.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/wisoga.pdfIn PDF document text
    • http://bruisedreedfoundation.org/clients/4/4d/4d9d7eec3bf3a09fa0457ace138f6a4e/File/xikovitejabowijedu.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/3a53000b3cfdc76bcd6c78294acaa2f5/ferasusug.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/49572020493.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/lekidisekufoxovexurelusug.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/ranenez.pdfIn PDF document text
    • http://lulanjina.net/upload/files/bezojawi.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/09bd40794159d9ea2f2d7e2575014c96/19428690782.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f46807a035---98386338157.pdfIn PDF document text
    • http://sevvalturizm.com/rsm/files/67358216109.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba95870afff---xenun.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/76766320948.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e5103726e6c---70813500771.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/38147717072.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/donepugokuveromizu.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/ce7931b3f043d75ca182ea43053ca4ab/58997797254.pdfIn PDF document text
    • http://okna-dvere-online.cz/media/upload/upload/file/35252779352.pdfIn PDF document text
    • http://www.celso.org/download/37022543961.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/10113057529.pdfIn PDF document text
    • https://nasroglobal.com/userfiles/file/46377477935.pdfIn PDF document text
    • http://fedoro.ru/upload/file/56495421831.pdfIn PDF document text
    • http://futureinfashion.com/ckfinder/userfiles/files/62179608472.pdfIn PDF document text
    • http://win-sonic.com/ck_imgs/files/linekowuladununane.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=coccothrinax+readii+pdfPDF 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_off0000e568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE568 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7A 20228 bytes
SHA-256: 1702eea03e174eedfb7e48ffd73b40af57167294a2055a6d96bfceaa3fef8544
font_02_sfnt_off0001320f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1320F 10636 bytes
SHA-256: 13d3342df4f359b8140b6306a622521c53ed1875e7ef0a0f35b9c95542b89a71