Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f39a627258502a…

MALICIOUS

PDF

83.3 KB Created: 2021-09-24 07:33:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8cb4cfdb81db19b0f363e8bd1666d966 SHA-1: 834815f63a687d74b2e98d2e3a883513c297f8bb SHA-256: 17f39a627258502a7bc979563b4a69a9f175bde40901398ab2200b22c0b6b958
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicative of a link farm. The 'tarot card reading book pdf' UTM parameter suggests a lure to attract users. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to external sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://rgcsmt.org/ckfinder/userfiles/files/18243801018.pdf In PDF document text
    • http://panziofabian.hu/fck_kepek/sozamifagova.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/kukefamafetimatatekus.pdfIn PDF document text
    • https://e-ssuances.com/ckfinder/userfiles/files/rifonimudubupifimon.pdfIn PDF document text
    • http://qbcar.ru/ckfinder/userfiles/files/dikesukuguzujame.pdfIn PDF document text
    • http://paitoonbox.com/userfiles/files/38405258032.pdfIn PDF document text
    • https://vinniescustoms.com/userfiles/files/43133245119.pdfIn PDF document text
    • https://henuopack.com/d/files/9345152736.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/039d40d6d3fc06c69b17d5b22eb93687/32584548831.pdfIn PDF document text
    • http://madveras.com/ckfinder/userfiles/files/wiruzarajaniji.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130de4914bdd---fijubotumasawilox.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad6345661c---61762562923.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/jinuxuzeperog.pdfIn PDF document text
    • http://kencert.vn/uploads/image/files/85860517046.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/52267910644.pdfIn PDF document text
    • http://www.programasaudetotal.com/arquivos/file/tedoniveraso.pdfIn PDF document text
    • https://pchome.uzai.ca/upload/files/navalupe.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/p5dt6cshh3nqd8b10m6vcigdsq/7609389355.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/1b8cca85bd46f24ecc4a7c7f963dc3f5/8379630745.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///23733083126.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/23322873569.pdfIn PDF document text
    • http://rs-entp.com/upload/file/wubiwolubukerepujoreju.pdfIn PDF document text
    • http://friulanapanini.com/images/file/41588605.pdfIn PDF document text
    • https://riolisboa.com/images/ul_files/file/mUhAOiCepQFy.pdfIn PDF document text
    • http://cautrucpalang.vn/webroot/img/files/11755636170.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=tarot+card+reading+book+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_off0000df2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2E 10776 bytes
SHA-256: 5150ff75daf0983a05c2ff6aa5d97be82903e2db814ae8d639944c90917226e0
font_01_sfnt_off0000f7b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B3 18704 bytes
SHA-256: 75b3791a8b414d6fe128e77f1a5de71c2acfad8959a421c38d995b5da2c87dd5
font_02_sfnt_off00012787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12787 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1