Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ab1f88f7ab49bba…

MALICIOUS

PDF

79.2 KB Created: 2021-09-15 17:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 018282c43c47166ccf94f1119218876c SHA-1: a4f44d68c99d3647edb5311d854fb4969fef1f5e SHA-256: 7ab1f88f7ab49bba0d5eb1e30e0e0188de4a6ffe739ef085aac891dff904bef3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to suspicious PDF files on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the user's browser or PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://cjsc.se/ckfinder/userfiles/files/41220342007.pdf In PDF document text
    • http://gtlfuelmarine.com/userfiles/file/febakowupelakefonagiv.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/86841146272.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/fusaxotolabunidepezikis.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16140b985ed348---80639708135.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/89908407274.pdfIn PDF document text
    • https://propage.q-cloud.net/upload/ckeditor/pages/files/45739601023.pdfIn PDF document text
    • https://menokatea.in/ckfinder/userfiles/files/vanivezagipevedilaj.pdfIn PDF document text
    • http://arcstema.com/userfiles/files/balofodatipad.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1631614063.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/lafosurap.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b67715a4a8---rosipowesesazusa.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/79971633092.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/mexefewu.pdfIn PDF document text
    • https://georeno.ca/userfiles/files/38341865157.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/wotoduka.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/napiwero.pdfIn PDF document text
    • http://potentialdesign.cn/userfiles/file/1631161839.pdfIn PDF document text
    • https://netcsemege.elelmiszer-hazhozszallitas.hu/ckfinder/userfiles/files/25692064737.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/takusopulozewagasu.pdfIn PDF document text
    • https://xn--bankkrtya-41a.hu/js/ckfinder/userfiles/files/sajedimetano.pdfIn PDF document text
    • http://1careglobal.com/upload/files/pelelilasomofuwur.pdfIn PDF document text
    • https://proartgaleria.hu/files/files/44639004606.pdfIn PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/relozanujulezaxananudib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=cosi+fan+tutte+full+movie+onlinePDF 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_off0000d38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38D 10472 bytes
SHA-256: 20f57a11033bcaa297f83c10eae6690238421b0216eec180c3b2fa3b64ca8393
font_01_sfnt_off0000eb60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB60 17188 bytes
SHA-256: 9fa6b98820e89fb31f2a340bab921daa963501dca89c8b3064bd7be1f83837fd
font_02_sfnt_off00011755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11755 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1