Malicious PDF — malware analysis report

Static analysis result for SHA-256 b05005885771b1ca…

MALICIOUS

PDF

68.5 KB Created: 2021-09-30 17:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 57563a62324cf46ed07fbcfe1b86c753 SHA-1: 6ec7fcfdf2cb78b07c0489a5d18ba404aad19427 SHA-256: b05005885771b1cabee1824e1c7618faa27d870c57a37a2201b9c51399011c86
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm. Numerous embedded URLs point to potentially malicious or disposable domains, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://cityclick.it/userfiles/files/fewusatojizididomo.pdf In PDF document text
    • https://orangcar.com/app/webroot/upload/files/9189374764.pdfIn PDF document text
    • http://1666-3668.com/attach/userfiles/file/polilawuripoxijerosogod.pdfIn PDF document text
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210926000334.pdfIn PDF document text
    • http://lor-rostov.su/userfiles/files/22348643285.pdfIn PDF document text
    • http://www.espace-hotelier.com/ckfinder/userfiles/files/bikijonikawi.pdfIn PDF document text
    • https://bipalisdemo.dashindonesia.com/userfiles/files/91112861939.pdfIn PDF document text
    • http://studiogiovannone.com/userfiles/files/wifid.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021091706384269.pdfIn PDF document text
    • https://vanphongphamhienluong.com/upload/files/305994261.pdfIn PDF document text
    • http://semihkerpiccilervesupersound.com/upload/file/98825122436.pdfIn PDF document text
    • http://cwesp.biz/upload/file/sunadezosofutunij.pdfIn PDF document text
    • http://edwindijk.nl/home/edijk/domains/edwindijk.nl/public_html/uploads/file/52932878630.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/jefasexe.pdfIn PDF document text
    • http://alconsprom.ru/ckfinder/userfiles/files/9400913332.pdfIn PDF document text
    • http://magic-mugs-factory.com/uploadfile/files/muvevu.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/kaxelubupi.pdfIn PDF document text
    • http://oecschool.com/userfiles/file/89525115550.pdfIn PDF document text
    • https://jphotographyllc.com/userfiles/file/pesafas.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/sgb4ab65u5l59ej6tse4dd6j2u/zigexinufuxirujelijezil.pdfIn PDF document text
    • https://mimpishio2.net/contents/files/towelejujolegizalixumidaw.pdfIn PDF document text
    • http://alidongdong.coco1490.com/upload/file_folder/file/tukawumugiwadeperevemoret.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=pretty+pretty+please+lyricsPDF 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_off0000ae27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE27 15660 bytes
SHA-256: 776a2e7213fd62819ee599249282f0122e8d2a84d3f22a32f0a78cf7455ea6ba
font_01_sfnt_off0000d528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD528 10256 bytes
SHA-256: 51bfc856a211bd37e0674777b88d397b3a01093ef3fc7627beead127d88de1cd
font_02_sfnt_off0000ec62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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