Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e84ce1fac40eb5…

MALICIOUS

PDF

85.6 KB Created: 2021-09-17 09:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 10a3ec3a7facf770a42ab1fb262191c6 SHA-1: 9eb3d62ec33875b4130e0da9e2c90f980540eac9 SHA-256: e6e84ce1fac40eb5cfc0471f7eefbeff38622189a7cf3b1e7e8fbdb3735fc39f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The heuristic 'SE_URGENCY_LURE' indicates the document likely uses deceptive language to prompt immediate action. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 https://pixomot.ru/uplcv?utm_term=five+on+a+secret+trail+pdf PDF link annotation
    • http://xiangzhuan.tw/upload/files/suwewusafaditujomimabajib.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/zofaxamu.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/24917424730.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/poporemenalefugaledipipip.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/281870134.pdfIn PDF document text
    • http://gloteckr.com/upload/editor/file/82580480218.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b52ebb7f9f---88786034195.pdfIn PDF document text
    • http://xn--hazrdner-r4a10d.com/alisveris/yollanan_resimler/file/lerosekum.pdfIn PDF document text
    • http://tuvantindat.com/uploads/2021-09-01/images/files/wexarudovotuvovajasopub.pdfIn PDF document text
    • http://sprinter-lab.ru/content/File/lotonurar.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/nufodotopumade.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/jegarafasezusenuruzaz.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/kofowufikaxanukix.pdfIn PDF document text
    • http://ladna.pl/user_images/file/30665810545.pdfIn PDF document text
    • http://trevorhannant.com/sogipowimeposozadu.pdfIn PDF document text
    • https://classykitchen.pl/web/uploads/files/54149367713.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/nr47un5988005063057vgeqr85/29010964944.pdfIn PDF document text
    • http://spostojow.pl/userfiles/file/tirekiwan.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614203402789a---sobanojapalezegepokupa.pdfIn PDF document text
    • https://petek.biz/resimler/files/baroxusimuwenuwivejat.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/26414298224.pdfIn PDF document text
    • https://kawanmto.net/contents/files/zikomapakug.pdfIn PDF document text
    • 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_off0000e8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B1 18004 bytes
SHA-256: e7e34d476215c5d97e8296a00dd105d557291f3dc3e378f6053bcce957944144
font_01_sfnt_off0001181a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181A 10656 bytes
SHA-256: 1c9d5dfbb07dcce6fe8cc73c78952b165590bf1a8ce1cec0af4bc5789d911297
font_02_sfnt_off000130a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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