Malicious PDF — malware analysis report

Static analysis result for SHA-256 114a0a963dca1817…

MALICIOUS

PDF

87.4 KB Created: 2021-09-19 16:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7e29d8c2c2186f0400d4e51b219a6bb0 SHA-1: 07c450ecab9f641312166415ddfd260aeee952d7 SHA-256: 114a0a963dca1817ce38650270283bb974f12913349d93dd4b0d37afafb47b2c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document may be instructing users to open a password-protected archive, a common tactic to bypass security scanners.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://chcial.ru/uplcv?utm_term=dls+2020+hacked+apk PDF link annotation
    • http://beming.com/ressource/site-image/files/98859727938.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2212dc5b2---dajabopaj.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/livepimuvibikimobe.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/ramemuwexaferufege.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/7aadc8f56b82de79668043ff6a8f1b3b/68935383003.pdfIn PDF document text
    • http://vet-spb.com/userfiles/file/juligoninifapipekikavowu.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/ea091e6630c9d461d447c46bb5154772/59940715880.pdfIn PDF document text
    • http://pk.mo/userfiles/file/fozizu.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/89291298754.pdfIn PDF document text
    • http://philipsphotographystudio.com/29286333060.pdfIn PDF document text
    • http://schuetzenfest-hemeringen.de/ablage/userfiles/files/76638226210.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/66310544343.pdfIn PDF document text
    • https://smartcrm.cloud/upload/files/doboroledadunokegifan.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/51405856170.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/xumusonabuvonap.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kizanaxebazapanepaloj.pdfIn PDF document text
    • https://abrasco.org.br/ckfinder/userfiles/files/88004937871.pdfIn PDF document text
    • https://termokingbt.com/ckfinder/userfiles/files/xowujufumesokibogebup.pdfIn PDF document text
    • http://kayapalinakliyat.net/file/10027297760.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/53730471345.pdfIn PDF document text
    • https://www.netcorp.hu/data/editorfile/22744975598.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/7324115374.pdfIn PDF document text
    • http://kbautotech.com/board/datafiles/imagefile/jutofinelotepowabaso.pdfIn PDF document text
    • http://putzlappenborner.at/editor_up/49021722753.pdfIn PDF document text
    • 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_off0000efd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD4 10432 bytes
SHA-256: 9f234abea8e55c9d00593eb2aa3a37c21c927fd2199ad78fb4eea74f0cf8fb88
font_01_sfnt_off000107b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B2 18752 bytes
SHA-256: 31b5d0390e64a17a0961aabeeb41c63c95407e3bb467af35cc4cb753b273a400
font_02_sfnt_off00013856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13856 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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