Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed8e3cb1cf0f37e…

MALICIOUS

PDF

80.4 KB Created: 2021-10-13 16:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ed95543f695f14d5c623fb42aae2a311 SHA-1: 8af890ff6748cbed93356ae494ffb26c054d05d8 SHA-256: 6ed8e3cb1cf0f37ed2985dede03e4ede2c91f07857ce2c0903bce310a0c526da
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, embedding numerous URLs that likely lead to further malicious content or phishing pages. The presence of a 'download button' heuristic suggests a lure to trick users into downloading a payload. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pistant.ru/uplcv?utm_term=nashe+si+chadh+gayi+song+mp3+free+download PDF link annotation
    • http://merrygoldholidays.com/ckfinder/userfiles/files/14964775169.pdfIn PDF document text
    • https://vozilasavozacem.rs/files/26614019189.pdfIn PDF document text
    • https://pontus-sd.eu/uploads/file/megabazogezivedebegupo.pdfIn PDF document text
    • http://radyoislam.com/resimler/files/sevutazonixumajeta.pdfIn PDF document text
    • http://18554080.com/userfiles/file/44353831818.pdfIn PDF document text
    • http://officegate.biz/admin/fck_upload/file/41414246507.pdfIn PDF document text
    • http://www.rupankar.com/fckimages/file/kaforofisagudukumiwomur.pdfIn PDF document text
    • http://linza-market.ru/upload/files/14727445428.pdfIn PDF document text
    • http://faptvmedia.com/userfiles/file/roguru.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/86087843022.pdfIn PDF document text
    • http://alconsprom.ru/ckfinder/userfiles/files/detuvebal.pdfIn PDF document text
    • http://sportingfoundation.com/uploads/file/19491652153.pdfIn PDF document text
    • http://online-cycling.com/files/file/mejevotamavokowopowore.pdfIn PDF document text
    • http://suspensionestg.mx/userfiles/file/wiviruxabamerigoragotazav.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/161429df1d766c---16660043612.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/81859075654.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/pajawepukazizidinin.pdfIn PDF document text
    • https://novsport.com/content/File/fixazipesox.pdfIn PDF document text
    • http://studiocariola.com/userfiles/files/90526281161.pdfIn PDF document text
    • https://nic-irq.com/userfiles/files/juwozigorugusilu.pdfIn PDF document text
    • http://azco.friend-match.com/upload/files/66846233703.pdfIn PDF document text
    • http://www.diplomat2014.ru/ckfinder/userfiles/files/95147940761.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/zewanunekisun.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_off0000ced2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED2 11316 bytes
SHA-256: 1bd959c210220bbff5293070d4e9785cbc74716901de0ea4892d8559a21ff9ce
font_01_sfnt_off0000e912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE912 19284 bytes
SHA-256: 1d7fd8c574bd3505e3e1ccf6ba005a09716133868ec0bb0ee5ad3fdf5b69c446
font_02_sfnt_off00011b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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