Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bdabe07bd57e2b2…

MALICIOUS

PDF

84.3 KB Created: 2021-09-16 16:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ea0b758242623f926e97e362b50ae283 SHA-1: 052439d52dd611b66d7800be232da8b01f41b4ab SHA-256: 6bdabe07bd57e2b265d16664fca8dbea1828fae79697618859b7e3647f7fd9ac
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The presence of numerous external URIs, many pointing to unknown or potentially malicious domains, suggests an attempt to redirect the user to phishing sites or download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://afmiletisim.afmiletisimajansi.info/resimler/files/maraxitipinexuxomazozebip.pdf In PDF document text
    • https://businessincasey.com.au/application/third_party/ckfinder/userfiles/files/30861405954.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/varelodowazeza.pdfIn PDF document text
    • http://chongthamnguoc.vn/img/files/5002085633.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210901212050172.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/kumasegarugogizelo.pdfIn PDF document text
    • https://danielstrehlau.com/userfiles/file/24043148205.pdfIn PDF document text
    • http://www.vegagastro.pl/upload/file/kefidaworoxewigo.pdfIn PDF document text
    • https://citronel.com/userfiles/files/mekususalimavamikedunizap.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/sbo40beqg3nor07eskholi9lk6/89568249168.pdfIn PDF document text
    • http://bugskin.org/userfiles/file/wokituvoxet.pdfIn PDF document text
    • http://kleinschadenexpert.com/userfiles/file/17859379826.pdfIn PDF document text
    • https://pu-sk.com/app/templates/js/ckfinder/userfiles/files/98647784762.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/21618964539.pdfIn PDF document text
    • http://barexkft.hu/userfiles/file/25788520632.pdfIn PDF document text
    • http://qataminational.com/uploaded_files/userfiles/files/91188675730.pdfIn PDF document text
    • http://hzaidele.com/images/upload/File/66070698515.pdfIn PDF document text
    • http://media-production.net/admin/ckfinder/userfiles/files/meduwozojigimov.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/tametamigiwejuvamixa.pdfIn PDF document text
    • http://asfalon.com/__files/file/57625024659.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/f8d9c92eda5418c0ca63e0a30fb85379/sewebabosigivoterasu.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/71174861100.pdfIn PDF document text
    • https://soi.icami.mx/ckfinder/userfiles/files/84497546529.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=istopmotion+app+for+androidPDF 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_off0000e574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE574 18056 bytes
SHA-256: 010ab80c89b9d2f81fb225132c79c52ac118ba9b4ffcc9fa460822b1dbca5173
font_01_sfnt_off00011453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11453 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C6A 10432 bytes
SHA-256: 7b3c7a1a42d069833faf3fffef34056910492bc57ccf82e48323b1ccadf0d317