Malicious PDF — malware analysis report

Static analysis result for SHA-256 61dab324737adc3e…

MALICIOUS

PDF

78.8 KB Created: 2021-09-02 08:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3ba5d7bb46f7f07463206a6baaed6e16 SHA-1: 12b55be04a1c3a1f9cd428c496faf9e2bb86ecc6 SHA-256: 61dab324737adc3ef0f46d20c27e4f1ed74855adc78a4c36d402a4e19af8d7e2
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 directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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://hublihorse.com/uploads/userfiles/files/farefomoxiwul.pdf In PDF document text
    • http://yuanda-boiler.com/d/files/bebep.pdfIn PDF document text
    • http://bogaarchitetti.it/userfiles/files/31942554221.pdfIn PDF document text
    • https://rcot.org/userfiles/file/83543760836.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/42288751053.pdfIn PDF document text
    • http://diclenakliyat.com/userfiles/file/gudebujalabizosozobasexe.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/banafumezapumeveponi.pdfIn PDF document text
    • http://safires.cz/ckfinder/userfiles/files/gasagujixidewusobu.pdfIn PDF document text
    • http://rockpapersun.com/upload_mce_image/file/50350941139.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e2ce11a3e---zizagilezibe.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/76c7ff5a3e68ea6a5156c9941a2e5862/38053824677.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/90743436217.pdfIn PDF document text
    • http://m4klynchburg.org/clients/3/34/34420611de4c9c7593cf5e5fe12de6df/File/68355259605.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/59307747065.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/np0bp1pfbi18bdpmqg3t7qmcos/pesozudiworizugojuleva.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/96938813397.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/15468838777.pdfIn PDF document text
    • http://thamcohoaian.com/webroot/img/files/3070656803.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/91743880301.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/31743659345.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16072d48845fce---67730040277.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/sevozuronibinurokup.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/rusumisixise.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=how+many+paragraphs+is+800+wordsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9BC 17356 bytes
SHA-256: b33810f93c86c6f6e61fac71f764fb79603f968d7b68e324eed0dd239222c4d8
font_01_sfnt_off0000d3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D4 15724 bytes
SHA-256: 22c975553acaf73e3b1808d2411a985e05b97d22489ce3408590940e01955bba
font_02_sfnt_off0000fbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE2 11084 bytes
SHA-256: 174709adbfcf6434b57f296e6ccff6f519dc3530eb6a8af5e839429b4cc56cf1
font_03_sfnt_off00011545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11545 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.