Malicious PDF — malware analysis report

Static analysis result for SHA-256 230f03e0b297ab87…

MALICIOUS

PDF

79.0 KB Created: 2021-09-17 23:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: f05bdfa79721fb32960f7acc7172a2ad SHA-1: f85357f95cd444d51e229a9a0b63d3574f1f3918 SHA-256: 230f03e0b297ab874c868b29b2676d4628e74f9d521fbdff5eacbdf1f449b58b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to a link farm, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://hvpeds.com/upload/contents/file/vovibufumud.pdf In PDF document text
    • http://emilygrilltogo.com/uploads/files/72345982401.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/gexoramufemabixa.pdfIn PDF document text
    • http://polyacer-ecp.com/userfiles/files/20210915_094816.pdfIn PDF document text
    • https://sunsoftinfoway.net/ckfinder/userfiles/files/54370188286.pdfIn PDF document text
    • https://komunalno.vrgorac.hr/files/85086738607.pdfIn PDF document text
    • https://www.loisirs-auto-occasion.fr/ckfinder/userfiles/files/33959772315.pdfIn PDF document text
    • http://monteconsultants.com/image/upload/File/tukulexawos.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/78010261847.pdfIn PDF document text
    • https://transdeliveris.lt/userfiles/file/vonabuwabugubezef.pdfIn PDF document text
    • https://learn-atdi.com/uploads/files/13428831014.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612eed0136fe6---limanugopufifebeza.pdfIn PDF document text
    • http://solmoda.it/userfiles/files/66858272833.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/misukidosuxu.pdfIn PDF document text
    • http://toitureetfacade.fr/data/Files/20255848483.pdfIn PDF document text
    • https://genia-groupe.fr/images/files/lerutakila.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/75526674577.pdfIn PDF document text
    • http://giga.sk/storage/file/jopenavoko.pdfIn PDF document text
    • https://etravelbox.com/scgtest/team-explore/uploads/files/25838472462.pdfIn PDF document text
    • https://mashura.co/userfiles/files/16020507583.pdfIn PDF document text
    • http://optimaglobal.net/ckupload/files/turimapadegibirumoran.pdfIn PDF document text
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/pafinuboremojavuper.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/daran.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=in+the+heart+of+sea+torrentPDF 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_off0000c7c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C7 21216 bytes
SHA-256: 22c354893986991a41bc69659e210c7c1cdbdd31316eeb37fd22b3a00ee47de8
font_01_sfnt_off0000fe3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3E 10124 bytes
SHA-256: f6d2d4f5dcadd6cb0740e0ce21b6ad423c3e9354d400176e9d75512e646b77ea
font_02_sfnt_off000114cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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