Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ee0a53abc10cd1…

MALICIOUS

PDF

80.7 KB Created: 2021-09-20 02:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 270824a1670d04be0f8efa25ef928b07 SHA-1: 55d0ca4a2f986b4b23181fe10f3a6825ab5b8b2f SHA-256: f7ee0a53abc10cd1ec725453223e5c2de351eee6d5ab6d0a5b49ea14a0258cdc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links to disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16142030616e8f---53224755129.pdf In PDF document text
    • http://dailycan.com/userfiles/files/867572610.pdfIn PDF document text
    • http://hhoasis.org/app/webroot/img/fck/file/23621626978.pdfIn PDF document text
    • https://southwestlooms.com/admin/userfiles/files/53659662868.pdfIn PDF document text
    • https://aaaxxion.info/images/file/panodozetidoxas.pdfIn PDF document text
    • http://makassitools.com/userfiles/file///90479738126.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/borudafagexa.pdfIn PDF document text
    • http://optimaglobal.net/ckupload/files/79451926363.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/vulaxu.pdfIn PDF document text
    • http://enidental.com/userfiles/file/20210904113009.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/gawabasalosi.pdfIn PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/lotigiragurobo.pdfIn PDF document text
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/zixazijoxemuzofupugiveme.pdfIn PDF document text
    • http://kd-council.com/upfile/files/ponapiriridukerikodomapes.pdfIn PDF document text
    • http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/xejametogexirip.pdfIn PDF document text
    • http://446888.top/userfiles/file/wavakiporem.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/92484664688.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/kinakom.pdfIn PDF document text
    • http://bdsductri.com/upload/files/32978191653.pdfIn PDF document text
    • https://iieng.org/editor/ckfinder/userfiles/files/72918624372.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/614789730af3b.pdfIn PDF document text
    • http://studiosiriosrl.it/userfiles/files/lovuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=mario+no+flashPDF 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_off0000d83d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04F 18308 bytes
SHA-256: 7577d2067f147a68897238f3280a3c4b96cab8f38e6f2653785424b3d8394553
font_02_sfnt_off00011f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F91 10076 bytes
SHA-256: 5c8979491c3731100b1360811d3996ccd67c1d8bfa00450762562052138ef628

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