Malicious PDF — malware analysis report

Static analysis result for SHA-256 e69afa9a4315cfbb…

MALICIOUS

PDF

73.8 KB Created: 2021-09-08 18:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bae117a9623b0e67c826ba2cfb29b433 SHA-1: e766179310d6918fc5600bbbed5269c736027ad6 SHA-256: e69afa9a4315cfbbf33121d34524fd6639c38d518d3ebfb67bc59d52cd11f9cf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a link farm. It contains numerous embedded URLs pointing to other PDF files, many of which are hosted on unknown or suspicious domains. The primary purpose appears to be directing users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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.
  • 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://abwhopewell.com/uploads/files/xiweredov.pdf In PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/89027367455.pdfIn PDF document text
    • https://titishop.co/upload/files/87874613074.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/bopesolebupobozisorop.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/pafazosuxisuragobabipoxi.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16135e85f3f061---95378312982.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137f682c3648---43449561990.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/599d063ada19baba8ed6ff28066bd43b/wejenovuzepif.pdfIn PDF document text
    • http://zzweien.com/d/files/22365455175.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/22716459821.pdfIn PDF document text
    • https://ruxthai.com/ckfinder/userfiles/files/kenurep.pdfIn PDF document text
    • http://lauraestetica.com/userfiles/files/46283168963.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/dusibavude.pdfIn PDF document text
    • http://samtekelektrik.com/files/94012054956.pdfIn PDF document text
    • https://cet.sk/res/file/64885142161.pdfIn PDF document text
    • https://artesapanaderia.xyz/aym_image/files/pokowaza.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/84247926632.pdfIn PDF document text
    • http://santeh.md/img/files/1399740816.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/94694460002.pdfIn PDF document text
    • http://abdon.madteam.net/ckfinder/userfiles/files/48724358176.pdfIn PDF document text
    • https://xn--80aesyq.xn--p1ai/files/file/55138511737.pdfIn PDF document text
    • http://sqc.jp/user_data/editor/ckfinder/core/connector/php/upload/files/49021253388.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/60386761159.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=training+evaluation+and+measurement+methods+pdfPDF 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_off0000bb15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32C 11076 bytes
SHA-256: cd48d01367fb39eede972162e2b1f11726d4cb02c412d2665f35be85a4c8bffa
font_02_sfnt_off0000ec8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8F 17308 bytes
SHA-256: 3c0d19e8ad1d4ad59b9f20ceffed3c2380c1b0a2c50703b9d389cc01496bdc50

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