Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ca2b32e0bc01983…

MALICIOUS

PDF

85.5 KB Created: 2021-09-13 06:34:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1618e4caba980613ad9849068d0288e7 SHA-1: d4ed7affd088253742a3d3f771e9c319ca66046e SHA-256: 6ca2b32e0bc019831b9a8b9f1c5d48ba45f94004f45706eb7299c2759c4900dd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm with numerous disposable URLs, suggesting an attempt to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://sbsoftware.ro/admin/userfiles/file/831371007.pdf In PDF document text
    • https://inprovitcaribe.com/ckfinder/userfiles/files/kasekojemudukilusane.pdfIn PDF document text
    • http://maybaobidinhdinh.com/upload/files/lumopebokapajidixopok.pdfIn PDF document text
    • http://icbiz.ru/userfiles/file/91099426036.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/86deb699ea9154a48df601620ea6cbaa/1988735364.pdfIn PDF document text
    • https://theurbanthinktank.com/files/32265520879.pdfIn PDF document text
    • https://sarenpinler.com/calisma2/files/uploads/73018834259.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/45714379819.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/90181526265.pdfIn PDF document text
    • http://dulichgiahy.com/upload/file/lulibulogazu.pdfIn PDF document text
    • http://xn--80aaaaaikdebj9ccf1ayja1b5a3q.xn--p1ai/ckfinder/userfiles/files/dilafinijesutewulime.pdfIn PDF document text
    • https://pataniforum.com/admin/jquery/ckfinder/userfiles/files/wukawijijedidunalezenax.pdfIn PDF document text
    • http://micruts.org/userfiles/file/70316028809.pdfIn PDF document text
    • http://prompol.com/media/file/55099852460.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/69686687218.pdfIn PDF document text
    • http://devitohomesorlando.com/userfiles/files/72197657525.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/71602812305.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/2111865796.pdfIn PDF document text
    • https://ontogepszerviz.hu/editor_up/65930648752.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/sunabomudenupevotukiz.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe6f09529e---59352344755.pdfIn PDF document text
    • http://jjburgerut.com/uploads/files/powofukixowe.pdfIn PDF document text
    • http://xn--b1agaa2anfqdp.xn--p1ai/ckfinder/userfiles/files/jawizid.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/ritekezazofutepumifanozi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+long+can+cooked+chicken+keepPDF 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_off0000eaeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEB 17404 bytes
SHA-256: c0fec19fcc330a967a6ab8b031ab0c292b52d561cb0a2717e59764a47ead40c7
font_01_sfnt_off0001180c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1180C 10596 bytes
SHA-256: edf8c1f75c1d8f04195441f89a2cce32eb84509f11896240df8078be395b0bbf
font_02_sfnt_off00012ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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