Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9bebf2c3be93dc6…

MALICIOUS

PDF

81.5 KB Created: 2021-09-17 00:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 228a07ee7e6c2d84ef378cae4ca31053 SHA-1: 1026810472b173f4e5fded1bdde210a710673fac SHA-256: a9bebf2c3be93dc6831e28f2434bd529d1a69f13552015993a756e0411b9f841
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains or point to raw IP addresses, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the execution of JavaScript to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://ketchas.ru/uplcv?utm_term=madea+farewell+play+online+free+123movies PDF link annotation
    • http://belv.ru/userfiles/file/tulap.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/5b193acc0a1a74eba9de040ad1ccc809/kurelufiwudasodewagav.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/givepuvekusidowunawire.pdfIn PDF document text
    • http://all-vehicle.net/js/upload/files/fimofowatoxowalupeju.pdfIn PDF document text
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/14264547624.pdfIn PDF document text
    • http://gespk.com/userfiles/file/70194040829.pdfIn PDF document text
    • http://labellebeaute.com.hk/ckfinder/userfiles/files/87259445665.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/161435fa166267---rulefegad.pdfPDF link annotation
    • http://winecellarkeeper.com/ckfinder/userfiles/files/movavagodutul.pdfIn PDF document text
    • http://mrybalko.ru/files/ruramiluturaxekemowixil.pdfIn PDF document text
    • https://bushregenerators.net/userfiles/files/mevakopajanil.pdfIn PDF document text
    • http://sdhmladavozice.cz/userfiles/file/89259956274.pdfIn PDF document text
    • https://www.dogandemir.av.tr/paketler/ckfinder/dosyalar/files/41900502965.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/43125357976.pdfIn PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/36067474318.pdfIn PDF document text
    • https://peusch.lu/userfiles/files/puguxopunixusut.pdfIn PDF document text
    • http://gasasosong.com/upload/fckeditor/file/18543991018.pdfIn PDF document text
    • http://icaalliance.org/filespath/files/20210911220158.pdfIn PDF document text
    • https://manorhair.com/uploads/files/202109040446242026.pdfIn PDF document text
    • http://rwdwebwebdesign.com/img-aim/files/kojawunawukuwevamibuvej.pdfIn PDF document text
    • https://slide-bearing.com/d/files/55934266516.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210910214910725.pdfIn PDF document text
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/71521610436.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_off0000d768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD768 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7A 18048 bytes
SHA-256: 99eb2680ef1c26b3bfd4f3ff1f0d5c0c47050de63587efdd504efc48d66b72af
font_02_sfnt_off00011dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFF 11164 bytes
SHA-256: f5e3cffd4a098104d1cf6bf901b6b6345d3e6d04ed671b06a8a6cec2542274a4