Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f6e0be061b1794…

MALICIOUS

PDF

80.6 KB Created: 2021-09-18 14:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e7b758b6d86dc9942f968d74c54a5845 SHA-1: 7fe7385475f642b4213e6b0f89b254364bb6b804 SHA-256: c2f6e0be061b1794cd31f517188f238bf69d57d61eb9119aee125d00481a4ac3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and multiple external URIs, many of which point to compromised CMS upload directories. This suggests the document is part of a phishing or malware distribution campaign, likely using the embedded JavaScript to facilitate the download or redirection. The presence of a link farm on disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/84b6c095b5d90583046fd08dff85d5ac/popizixorowudifaxezef.pdf In PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5740029c1---40968302145.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/6394177039.pdfIn PDF document text
    • http://safarang.com/basefile/files/15631312743.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/pidag.pdfIn PDF document text
    • http://friend5190.xyz/js/ckfinder/userfiles/files/zatem.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/lalaxopatitajufimuritel.pdfIn PDF document text
    • http://ingegnasrl.com/userfiles/files/55516881850.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/tilelenatarupibuka.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/67819734795.pdfIn PDF document text
    • http://leasingtowers.com/ckfinder/userfiles/files/wotigetunaleg.pdfIn PDF document text
    • https://elpollopaulino.com/cenavarra_userfiles/files/jazibawapamef.pdfIn PDF document text
    • https://almavilag.hu/files/files/vewoxitawipuda.pdfIn PDF document text
    • http://rucodelniza.ru/userfiles/file/xepifoziloxemarekorodo.pdfIn PDF document text
    • http://delfosventures.eu/userfiles/files/46101775797.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135358be5d2f---14850884211.pdfIn PDF document text
    • http://dealershop.es/camarasegovia/userfiles/file/12666782860.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/95034593755.pdfIn PDF document text
    • http://lica.plovdivweek.com/js/ckfinder/userfiles/files/kesesazitemetatuzilel.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/6c4c47edb46d3162ed567957d44ef721/gujevul.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/zulazexizotekinov.pdfIn PDF document text
    • http://88cpap.com/userfiles/files/35083125511.pdfIn PDF document text
    • https://longhungphat.org/Images_upload/files/21396835557.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=illuminati+mlg+clicker+mod+apkPDF 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_off0000d0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D4 19336 bytes
SHA-256: ad97e8c5f2b148b5ab3d5d1cfcdd370109f51c7a21b597b2569ddda2d4ed67d2
font_02_sfnt_off00011bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBE 10832 bytes
SHA-256: 736ce95a4f96e4f781bc9eb34687daa4631f958363d46ed58544dc2562ba1fca

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