Malicious PDF — malware analysis report

Static analysis result for SHA-256 abfaf7d49d39a5f4…

MALICIOUS

PDF

83.9 KB Created: 2021-09-23 06:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9de9fe02868714a324cc9a43782d1e6d SHA-1: 8e951088a1e45c46be2eaf99206e51212ee0ccd5 SHA-256: abfaf7d49d39a5f40efe6ca9c4862a383a8b37bbbcffa5d9e70948a29bbba231
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many of which are hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and URL patterns are consistent with a malicious link distribution scheme.

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 http://wdnederland.nl/file/59432304406.pdf In PDF document text
    • http://teledirk.com/d/files/bozewenuxixawezuxepozosiv.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f14e152c81---45867612943.pdfIn PDF document text
    • http://fcgo.tw/uploadpic/files/xinuxamujuzatavulebade.pdfIn PDF document text
    • https://tatvan.in/userfiles/file/16261584478.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/7c4c1daec615e14f5359b0ddc0345361/84557523751.pdfIn PDF document text
    • https://bomnuocebara.com/quangbasanpham/app/webroot/upload/image/files/sugepuxomefavotuvetet.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/48068590949.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/bebukorubelidas.pdfIn PDF document text
    • http://zatacorp.com/upload/files/60923952541.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614150e71615a---36780979243.pdfIn PDF document text
    • http://takramaipai.com/mypicture/file/42340432275.pdfIn PDF document text
    • http://cerrutistudio.eu/userfiles/files/wasufokem.pdfIn PDF document text
    • https://www.hsbofmn.com/ckfinder/userfiles/files/levinakulozivad.pdfIn PDF document text
    • https://melz-feu.ru/upload/94437839236.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/siluf.pdfIn PDF document text
    • https://middletonchambers.com/ckfinder/userfiles/files/soxafofolixepukalulabojo.pdfIn PDF document text
    • http://controlsystemco.com/cache/fck_files/file/46070215244.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/zarazun.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/14855030953.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb21c71518---28164112835.pdfIn PDF document text
    • http://noithathoaphat11.com/upload/files/11978649658.pdfIn PDF document text
    • https://bibliotheque-des-arts.com/ckfinder/userfiles/files/xidowuxebosedozelid.pdfIn PDF document text
    • https://sadhankendra.org/erc/media/54430161555.pdfIn PDF document text
    • http://quartierdete.fr/uploads/fckeditor/file/32132930635.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=the+book+of+the+city+of+ladies+full+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_off0000e304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE304 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1B 10920 bytes
SHA-256: b194f8a8320108e32eb59d80ac6b6fb9937039a83259b3e65db9bb7e8998bff7
font_02_sfnt_off00011463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11463 17288 bytes
SHA-256: f86d9c06569ab62b6130a81be967915627a90c719c7175bbacb7b3d3b34d2f7e

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