Malicious PDF — malware analysis report

Static analysis result for SHA-256 296f1afe14299d5b…

MALICIOUS

PDF

83.3 KB Created: 2021-09-16 11:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a66b87ad5293703a04634a465ce47d3d SHA-1: 25aedbc005c8d815d0916fd1cdc0cd856a4ada17 SHA-256: 296f1afe14299d5b44dc11961038a3085ba861e0d6ba5a0d7146686b50ee8247
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites or are part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The primary attack pattern observed is the use of a link farm to redirect users to potentially harmful content.

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://panegovernance.com/ourprojects/chowki/UserFiles/file/1715600029.pdf In PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/220fdfbb6f09e008063fe4abb271a16a/sujipijesabepavikale.pdfIn PDF document text
    • https://telechips.com/ckfinder/userfiles/files/62904586875.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-8/20210908233115694053.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/kupalonutugegewedolopup.pdfIn PDF document text
    • http://makesrealsense.com/ckfinder/userfiles/files/zabemuvutejiwol.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/dujixusavuru.pdfIn PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/fajakusixazav.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/zipixunebedo.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e68bfa5bfb---weseliz.pdfIn PDF document text
    • http://pactolous.hu/upload/file/niwotobov.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/69391463637.pdfIn PDF document text
    • http://www.chp.pl/ckfinder/userfiles/files/84863324798.pdfIn PDF document text
    • http://studiostocchi.eu/userfiles/files/movawog.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/93106086950.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/fedejujetuxonubasomugused.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f8b0ee10b---31197259035.pdfIn PDF document text
    • http://aallergy.friend-match.com/upload/files/xamoxu.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/79703922235.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614275b224561---83075499030.pdfIn PDF document text
    • https://www.tratedu.net/ssss2018/assets/143ad273/ckfinder/core/connector/php/upload/userfiles/files/5cc537bbb3ac324163d6430f4b6939a7.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/f1bba6389670b6d0d9904d2d477457b7/16475943539.pdfIn PDF document text
    • https://kaptenhoki.com/contents/files/29347138960.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=civilization+before+greece+and+romePDF 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_off0000dd7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7E 10948 bytes
SHA-256: 195967ceb5977e0b33bc8abaf51191fec0c5cd8e54ab5245570e25ba13e17018
font_01_sfnt_off0000f6b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B9 18796 bytes
SHA-256: 5d8d451248ba3450dacfaec08f8d9bc717f34c89e06f84ef96a203eaef4d6229
font_02_sfnt_off0001279a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1279A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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