Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d2d73ecb0c734fc…

MALICIOUS

PDF

80.6 KB Created: 2021-09-16 19:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2701763a0abc1e35788573c444873292 SHA-1: 230188bc4ad7d6a83d50d5b526c8ab2a8528da47 SHA-256: 7d2d73ecb0c734fc3e78b6bb9f08c2069f6d4f2fe936f94d9c5bdfd7a5962d0f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged by heuristics as a link farm and a potential phishing or malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://huntic.ru/uplcv?utm_term=plant+is+prokaryotic+or+eukaryotic PDF link annotation
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/91313408252.pdfIn PDF document text
    • http://studiorapizza.it/userfiles/files/xasitabejob.pdfIn PDF document text
    • http://hyundainhapkhau.net/upload/files/jufufa.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/jalivavis.pdfIn PDF document text
    • http://geometramaurotozzi.it/userfiles/files/remugegotepakupup.pdfIn PDF document text
    • https://alwillislifecenter.org/ckfinder/userfiles/files/13688950846.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/xaradifinedurex.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/80948388149.pdfIn PDF document text
    • http://armiikrajowej36.pl/public/upload/ckfinder/userfiles/files/81819812740.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/50484548703.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613a771053b28---97489882158.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/lofadelevixeravemezenik.pdfIn PDF document text
    • https://md-bud.pl/szklo/photos/file/tuxewosejimozedaf.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/sovak.pdfIn PDF document text
    • http://jdjcnc.com/upfolder/e/files/20210903230845.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/97810198122.pdfIn PDF document text
    • http://lineshare.net/upload/files/20210908041948.pdfIn PDF document text
    • http://logicparcel.net/uploadsEditorfile/xitaxawi.pdfIn PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/manunawinijidi.pdfIn PDF document text
    • http://all4pets.cz/ckfinder/userfiles/files/lerinexitodubuzizilazuz.pdfIn PDF document text
    • http://iknow.pl/files/file/53810482714.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/forofejaposakafogufi.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/85059162312.pdfIn PDF document text
    • http://gesundimjob.at/images/content/files/wudinoloripuzele.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_off0000d7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DC 17332 bytes
SHA-256: 96eaae0656ddf6c5f21ab526b319f10a92e3c1ceed42e8b9e71a97a6a02eb9f6
font_01_sfnt_off0001041a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041A 10672 bytes
SHA-256: 021f7737299f260ab2f59971061daad69acfb38dcccf1c29261970831051bfdf
font_02_sfnt_off00011cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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