Malicious PDF — malware analysis report

Static analysis result for SHA-256 465d47882eddf922…

MALICIOUS

PDF

69.4 KB Created: 2021-09-13 12:07:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3be7983cc1a4d5310cc264098e635480 SHA-1: 85050e20cae206bfe79ce5777c6754a3604ad72f SHA-256: 465d47882eddf9228847749abdeb16090311bed1226e5edbfc0de86d02edc3ea
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 external URIs and is flagged as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful websites. The PDF structure and embedded URLs point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://garglob.ru/uplcv?utm_term=how+to+play+video+games+on+android PDF link annotation
    • http://trustycctv.com/ckfinder/userfiles/files/20993802899.pdfIn PDF document text
    • http://vipdiler.ru/files/file/kiditesexupewu.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/20218839093.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///80647097989.pdfIn PDF document text
    • https://vcvscr.cz/www/www/fckphotos/file/74970480788.pdfIn PDF document text
    • https://mantyobras.com/userfiles/file/suvupusulixukitonenaxezik.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eec5d4005a---99299241254.pdfIn PDF document text
    • http://artin-intranet.com/ckupload/files/82870201666.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/lubugumetufederemewisapo.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/resuvogurejef.pdfIn PDF document text
    • http://suphammamnon.org/uploads/files/fufavozedinurelukosuw.pdfIn PDF document text
    • http://thuexe7cho.vn/upload/files/20485076915.pdfIn PDF document text
    • http://aqs-group.it/userfiles/files/xumezudazamiji.pdfIn PDF document text
    • https://topconta.ro/userfiles/file/58692929171.pdfIn PDF document text
    • https://ibextrail.com/editor-images/84588853839.pdfIn PDF document text
    • https://12shio4.com/contents/files/20071670915.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/92053487766.pdfIn PDF document text
    • http://banner-ever.com/ckImg/files/8198161453.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/lekolaj.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/metorinufu.pdfIn PDF document text
    • http://daiichihousing.net/uploads/news_file/rafeborifotelu.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bcad47273b---93504055810.pdfIn PDF document text
    • http://101eyewear.com/luutru/files/99502484768.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16306527815707.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_off0000b0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E0 15012 bytes
SHA-256: f1a1455ac72e1d91f3e8251c128e0afa2e4ef2be1ab60858918374ddf535390f
font_01_sfnt_off0000d69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69C 10992 bytes
SHA-256: 91db79f44200e8b99783e8fcf17fb7f1fbd545e6f2a3095d9d6505765dcea162
font_02_sfnt_off0000eff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1