Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ec8703e554ce30…

MALICIOUS

PDF

76.1 KB Created: 2021-09-18 23:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fa777b0a4946f66d05e96e3ed32bc950 SHA-1: 8218d6ec6d8226a28f3acd093da023d94eba2ac7 SHA-256: 47ec8703e554ce30f1c4a5003b041274394d1eb7cd462cc6a39ab2b13e19a27a
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 URLs, suggesting it acts as a lure to phishing or malware download sites. The PDF structure and embedded URIs point towards a phishing or spam campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://drafthe.ru/uplcv?utm_term=nom+001+sede+2012+pdf PDF link annotation
    • https://10s317.com/uploads/files/202109111417195946.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202109file/2021091319150170554.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16136acd97c1cb---pijaxoziv.pdfIn PDF document text
    • http://bienbao.org/uploads/files/89595920860.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/92316316394.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/91418518925.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/27927033615.pdfIn PDF document text
    • https://femagnet.com/upload/edu/article/file/80760157923.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/pokawonub.pdfIn PDF document text
    • http://ticketsperiodico.com/galeria/files/48568171787.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/jopuwolurenurexugoloduxi.pdfIn PDF document text
    • http://queenart.kr/userData/board/file/zojisamekazikikivosakaxok.pdfIn PDF document text
    • http://flemingdecal.com/uploads/assets/file/vokogipadaji.pdfIn PDF document text
    • http://huh.hu/UserFiles/File/zavumogetawugarixa.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///vebofasowufarogaxigobivuw.pdfIn PDF document text
    • http://omatsuri.kr/data/userfiles/files/vamejozafijoregebaluni.pdfIn PDF document text
    • https://rtquery.reitoken.org/Coaching123/images/files/telegudinupevofos.pdfIn PDF document text
    • http://kingbikeonline.com/images/upload/File/77380418936.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/gazakisepomeligepovigit.pdfIn PDF document text
    • http://hdg-gmuend.de/userfiles/files/giroxomoralamuzawop.pdfIn PDF document text
    • http://www.elstar.ru/uploads/files/27263662031.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/1588c4e37dec06d1c28e33c1f0837458/52116970812.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/nuporobusi.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_off0000c628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC628 10328 bytes
SHA-256: aaeb4775c7f6bed04628c1d5c5d38530e9f1eb66a4309fcf5e8608f501d3b06a
font_01_sfnt_off0000dd84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD84 16968 bytes
SHA-256: f3aa7f2d273816c6df0910f835f560e46482da1bbd70ae0f757dbd8313862f5b
font_02_sfnt_off00010990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10990 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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