Malicious PDF — malware analysis report

Static analysis result for SHA-256 d67b7d01314053fd…

MALICIOUS

PDF

76.9 KB Created: 2021-08-09 08:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c728588d49e7f632f67f6eb7a91383db SHA-1: c0395df0b53c72b2ae217d63401f1447cfd4e318 SHA-256: d67b7d01314053fd68d2128c1efcbce363b621d308906648714d5e02d085c22f
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users. The document body is heavily obfuscated and appears to be non-readable content, further suggesting a malicious intent to obscure its true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/c2bc1a62b71fed574e5338c9ffb72484/dinipoti.pdf In PDF document text
    • http://divapharma.com/uploaded/file/82478576902.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/e47a934915ad43ab4253e65f56579b22/73100304716.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/fitebe.pdfIn PDF document text
    • http://artside.org/data/temp/file/58458359435.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/35910123861.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e4add797d---96434628749.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/6a0fede72d2e32d8d057f32f15a2f128/mukep.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/29373a1c6859be4b805c717be49a4193/91167348657.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/80jlco4buro7lsrc13iabsu1u6/20093309392.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/87389899781.pdfIn PDF document text
    • http://goozzl.com/userfiles/files/gosulajokup.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a136af029e---55416410183.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/47086669079.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/cfb76bce543230292a12d338654d6c80/sozadud.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6627791f18---mudobonobelodapozon.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/rovudezi.pdfIn PDF document text
    • http://cw-cut.com/uploads/file/nivetawu.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/sio3c6jo7oatmi9vtuqpbr9gil/62562995942.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcd847ba2e---53041112226.pdfIn PDF document text
    • http://poketomecam.com/uploads/files/dadafukabumuwosefufi.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/6091944623.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838cc02a760---wuriruvigagonomikidimivi.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/ravorovolovedisevese.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/38634603843.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=hole%27s+human+anatomy+and+physiology+13th+edition+answer+keyPDF 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_off0000c5ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5EC 11480 bytes
SHA-256: 26cac03311779a90e626f56fd33ddc4cc9d0aadc0536cec803e8ede7ab760386
font_01_sfnt_off0000e0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D2 16512 bytes
SHA-256: a72fef21de184fbd1816f4c65060673da9e81770d8bba468506975433e3f83cf
font_02_sfnt_off00010bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1