Malicious PDF — malware analysis report

Static analysis result for SHA-256 206cbad9c1b40728…

MALICIOUS

PDF

88.0 KB Created: 2021-10-07 03:20:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 8aab7e459d8f3f8f4f72c42541d364b4 SHA-1: 4a5bad3e2897f42051ee2e6b1f2a4b6e96193ff2 SHA-256: 206cbad9c1b40728fab0258b96a80cb9440a3a4cd356605df29a5b51b4d89660
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to a link farm, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://2b3la571ga-70p.com/contents/files/58484878585.pdf In PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/161476a01d2daf---40640984422.pdfIn PDF document text
    • http://eegbiofeedback-leszno.pl/userfiles/file/93529396172.pdfIn PDF document text
    • http://yousefmaktabi.com/ckfinder/userfiles/files/1361016287.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/64689129796.pdfIn PDF document text
    • https://oasis-travel.ro/files/86174555578.pdfIn PDF document text
    • https://stepweystudy.com/ckfinder/userfiles/files/73765432065.pdfIn PDF document text
    • http://nayyaralidada.com/alpha/ckfinder/userfiles/files/nimazapufizatagibumup.pdfIn PDF document text
    • http://mebco.ru/images/file/69359959671.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/16687653158.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/98421991831.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614aff0d793fa---52180276149.pdfIn PDF document text
    • http://www.rpv-drachten.nl/files/file/wigofadozu.pdfIn PDF document text
    • https://shibbirs.com/media/files/98410585052.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/fatajeboromarujojonel.pdfIn PDF document text
    • http://taemyung.com/data/upload/file/mapuzadazaves.pdfIn PDF document text
    • https://cosmopolitanhotel.lastrada.bg/uploads/wysiwyg/files/38015079246.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/81258919708.pdfIn PDF document text
    • http://sskj.pl/userfiles/file/17703591150.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/3021034696.pdfIn PDF document text
    • https://testpensija.bankai.lv/ckfinder/userfiles/files/30832161927.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/40542964456.pdfIn PDF document text
    • http://chinastom.ru/userfiles/file/56911857787.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=train+to+busan+2+full+movie+in+tamil+free+downloadPDF 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_off0000e97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10195 10992 bytes
SHA-256: e901d3ee5c9a94163ca045fe411fef0c6b7afcbf3942fc0d068ff3af56d0711f
font_02_sfnt_off00011b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2D 20656 bytes
SHA-256: 88b3604fce7056b1b26ecf795f4b398a45385b1c90cf4391680d2a43487726be