Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1ddceedc43dd51…

MALICIOUS

PDF

91.2 KB Created: 2021-08-11 02:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: aaf23b415cc046c3596777b71b34bd09 SHA-1: eacafdeedf5fbe1c6c388f2bf74467fa4ab7f31a SHA-256: ba1ddceedc43dd518f494c8eaccd3310b7be399f57f7bff6216e5b86d777d374
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing and trojan distribution. It contains numerous links to compromised websites and a visual download button, suggesting an attempt to trick users into downloading further malware. No scripts were extracted, but the overall structure and URL findings indicate a malicious intent to exploit users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://rheumatology.instituteupload/content/file/zizowinapasigobevowokup.pdf In PDF document text
    • http://ildongwire.com/userfiles/file/pudazudumofemuzejimekej.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f03b3478596---81750838813.pdfIn PDF document text
    • https://mmszke.hu/files/file/5838751340.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/c8747520191303ee8d5878fdbd7e1f11/6011475985.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/minegoguzol.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160df8a3a8ab9a---93961882030.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/d2144423405be9b86d69bb90cc099db2/18302351420.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/43140245482.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160add2f641f9b---kopixoxepimoxujanujunu.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/fcd918272f7a0448ada4385e5dd0fdf2/96105722783.pdfIn PDF document text
    • http://takeacode.eu/user/d41d8cd98f00b204e9800998ecf8427e/file/jabufulajibebonakat.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/e75eba64768a62530c151f8f03537cec/datexezotifugiruj.pdfIn PDF document text
    • https://bitree.ru/ckfinder/userfiles/files/fawonaditujom.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/golivixetulasejezemag.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/800905ca8f8dc87c070e314613447ff3/jidamizife.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/673103b504ae7f69ae28cc49b79e11c4/19670689833.pdfIn PDF document text
    • http://pizzeriagiganti.ro/imagini_ws/sajetabenapapodol.pdfIn PDF document text
    • https://cqc-material.com/app/webroot/userfiles/files/sokoxojizivixujaji.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/82972926835.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/37164977662.pdfIn PDF document text
    • http://urjabatteries.in/userfiles/file/57874735237.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a79dd8809b---91574137856.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=acronis+true+image+2015+download+full+version+crackPDF 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_off0000ed35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001054c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054C 11572 bytes
SHA-256: 01d4db7be1f0eb2864dcd86ebab21f11c8f49656eb4714d99d49e2b76d6dfa6c
font_02_sfnt_off000120ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120CA 24540 bytes
SHA-256: 157a663e284f37fc588f515a59afc50d984174be7b54c111254848051013e071

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