Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ccf74505c34aadc…

MALICIOUS

PDF

82.0 KB Created: 2021-09-14 05:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 48b059723496cb82c68092f9731a627f SHA-1: abe39b9a4605c810562f558f7702cb60e19acfa0 SHA-256: 1ccf74505c34aadc8532bb6cbe633f2cb5766f99b78e3bab678d1401d7790a7b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to external sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of this document being used to direct users to potentially malicious or phishing content. ClamAV also detected this file as a 'Pdf.Phishing.Trojan'. No scripts were extracted, but the structure suggests a malicious intent to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • 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.
  • 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://arhstroi.by/uploads/files/tojig.pdf In PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613d9a0b1c296---6429748592.pdfIn PDF document text
    • http://camonetinternational.com/files/file/vavapizanoxope.pdfIn PDF document text
    • http://xaydunghoangthanh.com/img_duhoc/files/62074086602.pdfIn PDF document text
    • http://dotykbylinky.sk/_subory/subory/mofalosabup.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/9717235657.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/87341896981.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/zubul.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/sizini.pdfIn PDF document text
    • http://baocaosuhoatoc.com/luutru/files/7207555943.pdfIn PDF document text
    • https://eurosan.pl/user_images/file/sipatejekatevavijirizirig.pdfIn PDF document text
    • http://sonhanint.com/uploadpic/sun/files/202109122107586328.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138898bafd76---49150996956.pdfIn PDF document text
    • http://giovanninociti.com/userfiles/files/1932076482.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/93458961918.pdfIn PDF document text
    • http://eva.am/files/10161e9bdb1d8f4d.pdfIn PDF document text
    • http://www.celso.org/download/7603897141.pdfIn PDF document text
    • https://siroyensao.com/upload/files/21870097801.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/jozawi.pdfIn PDF document text
    • http://autoscuolapezzano.it/userfiles/files/ruwenupob.pdfIn PDF document text
    • http://madinaboys.com/easydo%20v2.00/files/uploads/jabukufekopunakixilu.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/82643282464.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=manga+box+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_off0000d97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97B 10116 bytes
SHA-256: 5ce5cbf6a668a91351d83188bc51954beeb2af484fc079d509b20c7d8d960349
font_01_sfnt_off0000efea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEA 18904 bytes
SHA-256: ec8704bdc8363c9f7095a92cc93696a2dcf692863cc2e5c4a3126a89bd9d6e23
font_02_sfnt_off00012114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12114 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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