Malicious PDF — malware analysis report

Static analysis result for SHA-256 30ef4f191b76c232…

MALICIOUS

PDF

83.9 KB Created: 2021-09-16 23:09:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 32bcff2af484af3e49267c5732f2f1c8 SHA-1: 267e956b1e9f5cc8b63f72f84f76f2358368e4d1 SHA-256: 30ef4f191b76c232a309a0db8595a274df92989f316fa1759979b276916ba53a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, many pointing to suspicious domains and forming a link farm, suggests an attempt to redirect users to phishing or malware distribution sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or credential harvesting campaign.

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gz-theoutfit.com/UploadFiles/FCKeditor/20210913153725.pdf In PDF document text
    • http://garankuccu.com/upload/fckimagesfile/3893e49152cb3c627b068c2394120dfa.pdfIn PDF document text
    • https://www.scmsgroup.org/ckfinder/userfiles/files/73160810468.pdfIn PDF document text
    • http://damvua.com/damvua/public/images/files/gusozolulezumoba.pdfIn PDF document text
    • http://lnv-cnc.gr/userfiles/file/57669737948.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/56399653968.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/161422278d6620---10291836770.pdfIn PDF document text
    • http://bienbao.net/uploads/files/17769358853.pdfIn PDF document text
    • http://gemwishrs.com/ckfinder/stones/files/90554675937.pdfIn PDF document text
    • http://xn----7sbjvweekof5d.xn--p1ai/files/files/27560236186.pdfIn PDF document text
    • http://konberdbio.com/upload/files/60856662378.pdfIn PDF document text
    • http://innotack.com/userfiles/file/70657583887.pdfIn PDF document text
    • http://studio5r.com/userfiles/files/33795194605.pdfIn PDF document text
    • http://xiangzhuan.tw/upload/files/wijafawazitekefezajov.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/71722615610.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/21022491549.pdfIn PDF document text
    • https://hgb.se/filer/file/suwopikajemidajugodelanim.pdfIn PDF document text
    • http://infas.cz/images/wiswig/file/69664169020.pdfIn PDF document text
    • https://mptradingcompany.com/userfiles/file/lizubukituwodijinawugabo.pdfIn PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/2589399833.pdfIn PDF document text
    • https://paardenwelzijnscheck.nl/app/webroot/files/ckeditor_files/files/xikesuvupefusejidusugam.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/76670664156.pdfIn PDF document text
    • http://monterroso-construpuntos.com/campannas/file/lanemodutifarimosos.pdfIn PDF document text
    • http://szguilong.com/userfiles/files/kusakutisi.pdfIn PDF document text
    • https://marblo.marblobaths.ph/app/webroot/img/files/bigolexenojin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=get+10+instagram+likes+freePDF 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_off0000e4a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A5 10740 bytes
SHA-256: 9bcca771c500b748be74433d474d0814958c66438bf54f313006ca971761f24a
font_01_sfnt_off0000fd64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD64 17212 bytes
SHA-256: a3416c3e0a1984107334e6ed361e25d45c291f2ac1de6ad284470577e32de93d
font_02_sfnt_off000129d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1