Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14b3e01d38d2b7d…

MALICIOUS

PDF

69.7 KB Created: 2021-09-24 12:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0dc12979ca6089fa3cdf5f16100817ed SHA-1: abfa9b419fb8680ebbc65cc9443e163f84d6eacd SHA-256: e14b3e01d38d2b7d9da95ac435410a26815c2d6b073da175632208793a4bfe60
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, directing users to numerous other PDF files hosted on various domains. While no scripts were extracted, the structure and numerous external links suggest a phishing or SEO manipulation campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://wojno-stal.pl/pliki/file/1215755858.pdf In PDF document text
    • http://thietbiotovn.com/Images_upload/files/98086322800.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/pafukixowanoza.pdfIn PDF document text
    • https://nhahangphongcanh.com/uploads/files/26684462750.pdfIn PDF document text
    • http://obras.ru/sites/default/files/uploads/72661149349.pdfIn PDF document text
    • http://vstarmp.cn/upload/files/20210923_030307.pdfIn PDF document text
    • http://master-br.ru/img/file/52977798273.pdfIn PDF document text
    • https://lodoshosting.com/calisma2/files/uploads/siredixokuvidifugupubasoj.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/66747710015.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/20269606664.pdfIn PDF document text
    • https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/9309708564.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/3995f8fae3b1098b4926e7dc00721d69/68702252180.pdfIn PDF document text
    • http://salamino.pl/userfiles/file/numozabuxalukawuj.pdfIn PDF document text
    • http://giasudaihocsupham.com/Images_upload/files/93402845887.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/85672252510.pdfIn PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/15399611813.pdfIn PDF document text
    • http://ahzgbh.news-read.com/upload/files/nodetuzufofibo.pdfIn PDF document text
    • https://grancom.by/upload/docs/58742091080.pdfIn PDF document text
    • https://ordermorestuff.com/cmsCart/upload/file/pidoxexefejatuwi.pdfIn PDF document text
    • http://manhtreminhduc.com/webroot/img/files/72292127951.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/76597859514.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/93212595849.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=3ds+smash+bros+romPDF 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_off0000afd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD3 10256 bytes
SHA-256: 95dea9d19158e1494feecc236565a2a6ee9241be479da6878d85c47ce54919b6
font_01_sfnt_off0000c6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C8 16476 bytes
SHA-256: d6f2c86564b916831f0135c8ab23711912465c3a2e832bf1822101b96874296a
font_02_sfnt_off0000f121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF121 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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