Malicious PDF — malware analysis report

Static analysis result for SHA-256 080a9f275b3b4b63…

MALICIOUS

PDF

89.7 KB Created: 2021-09-20 11:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 44b85966261bf131484f5071831c73e5 SHA-1: 417589c9370385b88ec1cda5a1774b7e52bb2c49 SHA-256: 080a9f275b3b4b63877ac39bb9f428105359232176db507ee1e2dc9cc2501a74
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to suspicious domains, suggesting it functions as a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it may leverage embedded JavaScript to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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.
  • 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://girisimcilikproje.com/resimler/files/watimezisodovitazovawozil.pdf In PDF document text
    • http://fonnepal.org/userfiles/file/51004481522.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/jijilagojufugatinoso.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/15689573519.pdfIn PDF document text
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/niwejidedebuxa.pdfIn PDF document text
    • https://beta.nhatthiengroup.com/files/uploaded/files/54381140935.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/69737115810.pdfIn PDF document text
    • http://ipai-bg.eu/img/file/25242716334.pdfIn PDF document text
    • https://studiovizia.com/webroot/img/content/files/99206742289.pdfIn PDF document text
    • https://emailing-online.fr/uploads/userfiles/file/jikuzosuborilepanope.pdfIn PDF document text
    • http://exms.fr/sites/default/files/file/rubukizadep.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/20709892121.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135ce8416d37---vusixazozifej.pdfIn PDF document text
    • http://transgusto.ch/userfiles/file/1998587985.pdfIn PDF document text
    • http://voyagevietnamlaos.com/hinhanh/file/wozoxawilinejipodigebew.pdfIn PDF document text
    • https://proia.bg/userfiles/file/94227449230.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161400a9f57b27---15208973301.pdfIn PDF document text
    • https://nationalshield-uae.com/userfiles/files/gosakera.pdfIn PDF document text
    • http://dungcucaytrong.com/images/files/12417680629.pdfIn PDF document text
    • http://www.sospapa24.com/lib/ckfinder/imgupload/files/72070139625.pdfIn PDF document text
    • https://leciv.fr/uploads/FCK_files/file/22658498614.pdfIn PDF document text
    • https://bibonatura.com/ckfinder/userfiles/files/74949577742.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=lehninger+principles+of+biochemistry+pdf+4th+edition+pdf+free+downloadPDF 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_off0000f592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF592 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA4 18568 bytes
SHA-256: 9828ee51a7020be8f0b25d4dcc30180b5984dfe78b9b7b9a3c82b595eb71a4ad
font_02_sfnt_off00013e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E99 11440 bytes
SHA-256: 5f12c02dfb34e0bb452b153262830217214214ee6a9f3fd5eb09ffae1c563116

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