Malicious PDF — malware analysis report

Static analysis result for SHA-256 348e712e26bff1cc…

MALICIOUS

PDF

90.4 KB Created: 2021-09-17 05:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fb3d27cc17781bd810a2fb990893871f SHA-1: 699cdca6c7b3a7cd9dab720c2949a4c62b9b8c9c SHA-256: 348e712e26bff1cc285cbb2a03322167bc0e28709fa8f39599ee34f70b8fafe0
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's intent to trick users into revealing sensitive recovery information. The presence of numerous external URLs, many pointing to PDF files on potentially disposable domains, suggests a phishing campaign. While no scripts were explicitly extracted, the PDF format can embed JavaScript, which is often used to facilitate such phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://multimetrics.com/ckfinder/userfiles/files/duzebiturajagak.pdf In PDF document text
    • http://baaningdoi.com/file_media/file_image/file/kuwunaxamodi.pdfIn PDF document text
    • http://anadolumatbaa42.com/genelresimler/file/99157996732.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/39436539487.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/61778680147.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/jiwogereruxukiwuxesigaxu.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/91938160121.pdfIn PDF document text
    • http://workontext.ru/media/file/10584892812.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/fumiwewugivivukorivux.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/sekezasanosaginajasifafiz.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/perununi.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/l6125sco96te3747auku1m3k48/73458509155.pdfIn PDF document text
    • http://kbidc.kr/upload/editor/file/1630518265.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16136143512e04---69777307384.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/57189075570.pdfIn PDF document text
    • https://solelane.com/ckfinder/userfiles/files/14816301968.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/1661406302.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/5855305418.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/bupiladewibi.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/89406747578.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/rizijebog.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/58242285109.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/2097841438.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=pinata+hunter+2PDF 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_off00010187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10187 10092 bytes
SHA-256: 07342066328d329ca5a04c681f68ccf0c69185241661cae212dcd6b38455a226
font_01_sfnt_off000117fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FC 17248 bytes
SHA-256: 6c4c4d29b1c74e625060e74174ad570101e0d75b7139f5e9e7d01a4418f35a15
font_02_sfnt_off0001446f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1446F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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