Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2b1bffb984392b…

MALICIOUS

PDF

83.8 KB Created: 2021-09-13 12:26:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3913482d769b7469ac13cdb719de4179 SHA-1: 355e2582d808830b31bfdf908a55500f42e22f17 SHA-256: 6c2b1bffb984392b3ab2497363edf59149a5e9578a08f5a8fcacd135d3bd9cf5
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to disposable domains, suggesting a link farm designed to distribute malicious content. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document may also attempt to phish for sensitive recovery information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 http://hanstime.com/userData/board/file/69294614825.pdf In PDF document text
    • https://siltri.com/fck_upload/file/zinalajogufatovifimilosa.pdfIn PDF document text
    • http://cmuniontravel.com/userfiles/file/fiwejodojibuxano.pdfIn PDF document text
    • http://redemaisfarma.com/userfiles/file/21207444400.pdfIn PDF document text
    • http://montpellier-businessplan.eu/mbp/upload/images/images/upload/ckfinder/fafivigafonig.pdfIn PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/pitabadalekamaruzuxakos.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/60315333379.pdfIn PDF document text
    • https://mangalargalux.com.br/ckfinder/userfiles/files/tamevadudoxopakivawixixe.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/11162172360.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/tavagaxuvusejugomaxewagek.pdfIn PDF document text
    • https://quatcongnghieput.com/uploads/files/zufadoribigutisejigikos.pdfIn PDF document text
    • http://balaton.varosom.hu/userfiles/files/beditejinonorafemejo.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/pawozixirisarajovudeza.pdfIn PDF document text
    • https://pushtypathshala.com/demo/aims/files/images/files/vupedovok.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16138091324bf3---vosomadiwuladiw.pdfIn PDF document text
    • http://jingyilin.org/uploads/file/kedodudegezolomanexon.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161306dd2f0320---35229997337.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/95682002665.pdfIn PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/94072416292.pdfIn PDF document text
    • http://defhjdrjioo.friend-match.com/upload/files/jejowukewenajaledixubib.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/66783992463.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/35003143088.pdfIn PDF document text
    • http://www.wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/35981271120.pdfIn PDF document text
    • http://tuvantindat.com/uploads/2021-09-05/images/files/46713459479.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/dadigubozevub.pdfIn PDF document text
    • http://cmorshomecareassociates.org/uploaded_files/userfiles/files/jugalima.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=download+terraria+old+versionPDF 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_off0000e49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49B 17144 bytes
SHA-256: dada97ac29a16493e783b15bb151ea1e39d478255a98d7ee8d300382a5212d30
font_01_sfnt_off0001112b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1112B 10392 bytes
SHA-256: f00b03d965e2b82a05a8b36220f64cc861cdb66bfcd67c7dc4844eff7a4b84ca
font_02_sfnt_off000128dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1