Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dee56ffc48564dd…

MALICIOUS

PDF

74.1 KB Created: 2021-06-30 21:19:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 749d9655f49735ff98a4497ab38a8258 SHA-1: 85bcdf1dbf84a6b02ec9426ebad109468ba247d9 SHA-256: 9dee56ffc48564dda89a1507e07e11fda4074ecff3a0c50d7f52f8caeeda0aeb
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The presence of numerous PDF links, many pointing to potentially malicious content, strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://zionapostolicministries.org/uploads/file/wiwexe.pdf In PDF document text
    • https://invest.pl/userfiles/file/dutokeli.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/706683f9922dcf708293dcfaae17447a/33935269279.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/vomilidosopek.pdfIn PDF document text
    • http://cokhihoaiduc.com/uploads/files/98969944730.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/fedidefotezenuzawerabo.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c791b7f314d---88711717977.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/texupinegul.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/frgm5pdaj8m4p9s15g0a4iks1p/72455591292.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/bvbf0pcluldjphem22fnaevou4/74390160424.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/74475847915.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f19ab0b0c---60706032461.pdfIn PDF document text
    • http://fotossc.pl/_files/file/sixujuwawulilirujem.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16098c1311862e---vesuvejuboligu.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/95583665416.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d5fe8ba28---61704304549.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/21775331929.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/naposudomiped.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609f02b59d2b8---woxag.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/el1mio48f3l6pu3u4dt9u4c3g6/76461841876.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/02888fd1fe82b66c4adf04b89a0f105f/munusedidelapibipiwiwurik.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/40559d83d58f22edd65b79e462c83112/bonotape.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/b15745b633fe8fe967df197c3b45cbb5/45100507930.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/n1lgck3k196umpifioe4pvd3fg/95710471955.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=fire+and+desire+drake+mp3PDF 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_off0000bd04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD04 10532 bytes
SHA-256: 34077ef1e72ea2d83049e8a966bae7b0ad8322ca388ecd1d9bc990138b8c194a
font_01_sfnt_off0000d4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EC 17300 bytes
SHA-256: ad7cf02b29b285401d813d7b301b698ed0cc501cbcf9b90609f737466becb848
font_02_sfnt_off00010195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10195 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1