Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a5f2036e17ae594…

MALICIOUS

PDF

82.2 KB Created: 2021-09-21 12:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 1b5662a97d85b7896015cf2084a9744f SHA-1: f5d2eeac8ce2d53d0edbd9761677fbbffcc21e35 SHA-256: 6a5f2036e17ae594f79792f85d37e82547d4e20f1395f5d2678b2299ea89498c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to disposable domains, a common tactic for hosting malicious content. One of the extracted URIs points directly to an IP address, indicating a likely attempt to serve a second-stage payload. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613efddf610d5---zorosoduramamuxobijiwuna.pdf In PDF document text
    • http://ricarda-allegra.de/userfiles/file/nifuramevumari.pdfIn PDF document text
    • http://ketoanaca.com/uploads/image/files/74270099371.pdfIn PDF document text
    • http://bnblspecialities.com/userfiles/files/fokisetubupufebojudedex.pdfIn PDF document text
    • http://christopherdallo.com/file/gimatewifewaledabikota.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/newob.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/58795472162.pdfIn PDF document text
    • http://argyleliquidations.com/userfiles/files/wafojigitexan.pdfIn PDF document text
    • http://hanarotalk.com/userfiles/file///niripubuma.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16147d97a4d846---faxote.pdfPDF link annotation
    • https://garraldaarquitectura.com/garralda_userfiles/files/50520066235.pdfIn PDF document text
    • https://irantruck.ir/data/file/21513591990.pdfIn PDF document text
    • http://worldsocialistpartyindia.org/ckfinder/userfiles/files/ketirifisabugut.pdfIn PDF document text
    • http://alhegazgroup.com/userfiles/file/jokupiz.pdfIn PDF document text
    • http://wordtmann.beckbauer.eu/ckfinder/userfiles/files/donawuxununa.pdfIn PDF document text
    • http://bedrucken24.de/userfiles/file/49112781315.pdfIn PDF document text
    • http://hitplus.eu/userfiles/file/62666036292.pdfIn PDF document text
    • http://transgusto.ch/userfiles/file/sibinenika.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/kabut.pdfIn PDF document text
    • http://titusauto.hu/kepek/file/68751273010.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210904/2109041531095462350iyh16w3fl8s.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/26750286266.pdfIn PDF document text
    • https://estudiowebcolombia.com/ckfinder/userfiles/files/35630833851.pdfIn PDF document text
    • http://gcsiva.com/files/userfiles/file/dituxajakoze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=game+apps+without+adsPDF 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_off0000dbd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD5 17880 bytes
SHA-256: 2fc0b766e4cfd342c76a887c258903245115a662bab65e542fdbfec578f58c39
font_01_sfnt_off00010aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B9 10632 bytes
SHA-256: 3f580f7bde8dbf873cfeb01bfb067ee0a8f098b48909272ad1e87f5407aca7d0