Malicious PDF — malware analysis report

Static analysis result for SHA-256 759e88788447e214…

MALICIOUS

PDF

74.9 KB Created: 2021-06-13 01:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0e165e70f805c9bcd1b77c638b2fb91c SHA-1: 257a1045b761d322e8fdc1f7d92a46bcdffa7424 SHA-256: 759e88788447e2146c0b7b9d6b26409e4de2856ff580d9371ca447122a9b356b
176 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, indicating it's a phishing or trojan delivery mechanism. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious payloads. The document body, though partially corrupted, contains text related to MP3 downloads, likely a lure to trick users into clicking the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://medvor.ru/uplcv?utm_term=ha+hasi+ban+gaye+mp3+song+free+download PDF link annotation
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160969c5b6d2d3---lepebirerajo.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/a3e6f7bf8737b6b37a2d1bf600204dfc/mejudikekumulaxopup.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eafd77aa0b---65461080705.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/85941e1cbabb15606e518490afefec35/bexifowibadoxomaxoveb.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/9e172a38207a87ad839fefff8479bee3/52523684583.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/54982728638.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/59097bfb52033d0a06d9ed8529c04031/difamavizuniruteminafu.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160898ba637c17---fisum.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d8c37a0a5---88571768241.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/ccd199a8d18a85023435b50ee2006aaa/57197039446.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/wilujumo.pdfIn PDF document text
    • https://emauto.lv/index/images/up/file/99466353280.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/f346593060eba455191cb22ce5e5bdf6/41154530191.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/2547f635fd1083692cdd251d1468850d/zebus.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/d3a8228734cd24e8aba5d950af637d05/fopetunox.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/ronelebumizijizofuzepa.pdfPDF link annotation
    • http://x04ydivan.ru/userfiles/file/lirowonejilejidemedomasut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD678 5916 bytes
SHA-256: 6d5c8d5be77155f151134b818609d7d2758d7f0183fc8140fe9da2da3f7e7849
font_01_sfnt_off0000ea89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA89 11196 bytes
SHA-256: 440d88dd4b0b79bb82a2769cf717fcd3de1da7815573fb1c74e1b74855c0c927
font_02_sfnt_off000110e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E6 3392 bytes
SHA-256: 4d595dd4b0c6f68bb1e16739f15410fe50b9a78de08cbf26f8a7d02bb3535a06

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