Malicious PDF — malware analysis report

Static analysis result for SHA-256 02387b917ea09a2d…

MALICIOUS

PDF

70.5 KB Created: 2021-09-28 16:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ee74d48a31e67067875b1a8bb782ec47 SHA-1: 301e019b5f82152381fc12cc8e740ec719e36112 SHA-256: 02387b917ea09a2dee92dc9283cf176be7d67fb4a9916f718f1c195e2ea7f5a9
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, many pointing to potentially disposable hosting, suggests a link farm or phishing lure designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://firsathosting.com/calisma2/files/uploads/98385582096.pdf In PDF document text
    • http://taemyung.com/data/upload/file/77387355541.pdfIn PDF document text
    • https://mayersoffice.com/userfiles/file/lejewiga.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/62330441651.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/wusedaxunivisabedudu.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d5b21ea2ff---8264886636.pdfIn PDF document text
    • http://myphamvickwhitebeck.vn/luutru/files/35189229926.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/22640025229.pdfIn PDF document text
    • https://futurefacesnyc.com/uploads/file/rogona.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/koninexezapibatapomu.pdfIn PDF document text
    • http://eiffelflowersquesnel.com/userfiles/file/bezojezawigo.pdfIn PDF document text
    • https://sarvodayasamaj.uk/upload/files/nonosure.pdfIn PDF document text
    • https://adian.eus/files/galeria/files/gufatonuzir.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/c668a4c7f8de889eb4c2126a959f9671/31923546482.pdfIn PDF document text
    • http://muabannhagiare.net/images/uploads/files/siwifobisoxenevuruxi.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/mupatokej.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/betala.pdfIn PDF document text
    • http://cuacuonnhanh.vn/Images_upload/files/41489964980.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/xazijo.pdfIn PDF document text
    • http://sissonne.hu/editor_up/73243662041.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/84027068603.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/69902090387.pdfIn PDF document text
    • http://artin-intranet.com/ckupload/files/dagurozetoranomibuzulubim.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/mobanidew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=gordon%27s+functional+health+patterns+questionsPDF 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_off0000b1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1A8 11036 bytes
SHA-256: fc9a626d7a8770c07121e7b5f5052f4edb850d0c4474ab7226837dc4667e5006
font_01_sfnt_off0000cb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE332 16184 bytes
SHA-256: 4f2576fb701fd809d3848593e62ef763ebefe1f8576dc10117e177d9798ca875