Malicious PDF — malware analysis report

Static analysis result for SHA-256 480378b4031103b2…

MALICIOUS

PDF

80.1 KB Created: 2021-09-15 03:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f475a8d4c0671854070e9412600bda7d SHA-1: 0bb67cfd3c6c136f07a2a02005179ac50f58fd51 SHA-256: 480378b4031103b21ddd1a4bbfd0cc2067bfff108616c8319d8196e51b3372db
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document is designed to trick users into downloading a password-protected archive, likely to evade security measures. While no scripts were explicitly extracted, the presence of numerous external URLs and the overall detection profile point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://fpcofmacon.com/nbloom/fckuploads/file/mexijegipugawenejub.pdf In PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/1a76ce36sn0373o4ikn6ojugmj/12246256296.pdfIn PDF document text
    • http://intimatehotelpattaya.com/image/upload/File/94627824416.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/tekasudojamotak.pdfIn PDF document text
    • http://sportsclinicwest.ie/media/contents/file/97511264345.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/bevavosireximorufetif.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161412cd8eb4be---juloxiwejitagimuvelimino.pdfIn PDF document text
    • https://akconta.com/uploads/files/jekosojenuvir.pdfIn PDF document text
    • http://slesnick.net/userfiles/files/pesutu.pdfIn PDF document text
    • http://jar-ted.pl/file/vuwatosaporewugomivida.pdfIn PDF document text
    • http://kondicionery-noginsk.ru/upload_picture/file/nunebavenop.pdfIn PDF document text
    • https://ylwlgwadmin.ylwl.cn/upload/files/20567131099.pdfIn PDF document text
    • https://repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/wisupemeganutawozerexam.pdfIn PDF document text
    • http://cargologicru.com/sadm_files/50062609396.pdfIn PDF document text
    • http://mobiliteit.nu/files/3596695789.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/98144535690.pdfIn PDF document text
    • http://goldenstarhotel.vn/images/uploads/files/gurebiladit.pdfIn PDF document text
    • http://appextskihjthj.handysociality.com/upload/files/bukoxozenazoxokedimakipux.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/zimabuzewavenufo.pdfIn PDF document text
    • http://birkhoffhi.com/userfiles/files/24817615503.pdfIn PDF document text
    • https://samudra99.com/contents/files/84360431896.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=es+file+explorer+otgPDF 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_off0000d3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C9 10352 bytes
SHA-256: fcb25674080cc9d815728b3a0d40b775f0b55069a8ad845bf42114d92db4577c
font_01_sfnt_off0000eb48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB48 18764 bytes
SHA-256: 77f55d12b33b52f2b7b4aeaee931e646555e3de59efaa97dc430ffe0d3fffc8d
font_02_sfnt_off00011b51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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