Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f3d5c6feb47f9b…

MALICIOUS

PDF

78.5 KB Created: 2021-09-18 23:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 867f0cdfb7a9a5938c21f330ab6bec5c SHA-1: 2348ac0b90dfde582e5d1b832b6808ac4f6005a0 SHA-256: f6f3d5c6feb47f9bf8b831155406d2fc1af28f1ab10a63aa13fea1635b732d74
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to suspicious domains and are likely used to redirect users to phishing sites or download further malware. The PDF structure and the presence of external URIs suggest an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://hantverkarenisandby.se/UserFiles/files/vavudi.pdf In PDF document text
    • http://hoilhpnqbthanh.com/upload/file/5668420085.pdfIn PDF document text
    • http://gutachterbewertung.de/userfiles/file/papatulozoz.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161382c554540f---11380853737.pdfIn PDF document text
    • http://abnig.friendship-match.com/upload/files/dilenobutizoliwajekenaj.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210908054719456362.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/tudop.pdfIn PDF document text
    • https://anna-bel.com/app/webroot/files/userfiles/files/dizupofixuxol.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/5242828433.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/dajaju.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/tozed.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/6014793325.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/kexexefuw.pdfIn PDF document text
    • http://xn--aknmedical-yub.com/uploads/file/juvadalukok.pdfIn PDF document text
    • http://freetds.net/userfiles/file/nafuvaju.pdfIn PDF document text
    • http://tpt.taipei/asset/uploads/files/20921740217.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/fusipibomugigunidelu.pdfIn PDF document text
    • http://broadcasthub.com/ci/userfiles/files/99063521108.pdfIn PDF document text
    • https://self-storage.sg/images/uploadedimages/file/jemiditipop.pdfIn PDF document text
    • https://intersat.lv/files/file/24872836793.pdfIn PDF document text
    • http://szilasfood.hu/pic_upload/files/15138641989.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/28768398389.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/mesogax.pdfIn PDF document text
    • http://evolutionchonburi.com/userfiles/files/wubil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=binge+wonder+womanPDF 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_off0000cd9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AF 18252 bytes
SHA-256: 3e170309d2c9d5b2f144d5c5805171d349a25e708eb833e5a5aac03d869ba247
font_02_sfnt_off0001150a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1150A 10416 bytes
SHA-256: 9989cd35c077f89a526403648b5ee546b519b8920483a9f53341a1ac24866bd1