Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0b53eec384201a…

MALICIOUS

PDF

92.8 KB Created: 2021-10-05 05:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 47d54cbf572585ba302aefc370ee9cf0 SHA-1: 0dc95fd040db6d61dbc12cb36e850fe6696902bc SHA-256: fd0b53eec384201a20d7bed2317eae9122706a3728791672fd7c96b29943c009
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a large number of external URIs, many hosted on disposable domains, suggesting a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://triyoga-tv.ru/userfiles/file/74841136810.pdf In PDF document text
    • https://resicolor.com/upload/files/memazevolasajezopubukaji.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/dd9ad703b2a0ec2a3afa6fcc17d7302c/wiwupumibe.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/lufipameduwisi.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/59926656627.pdfIn PDF document text
    • https://bisleriuber.genefied.co/ckfinder/userfiles/files/58444076925.pdfIn PDF document text
    • https://umutfm.com/resimler/files/45103053688.pdfIn PDF document text
    • http://lotusburbank.com/uploads/files/pupinatiriganupukek.pdfIn PDF document text
    • https://airin.lv/images/userfiles/file/19921616899.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/836a8d096a5dde64d4f47a53a4072899/muzolegimiwukafovabizi.pdfIn PDF document text
    • https://3rproject.eu/ckfinder/userfiles/files/3038027004.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///99638265155.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/lovanetirezajixuginevaz.pdfIn PDF document text
    • https://minervatech.work/js/ckfinder/userfiles/files/dodapejuvu.pdfIn PDF document text
    • http://pataibicaj.hu/userfiles/file/23387016153.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/62443397051.pdfIn PDF document text
    • http://bienbao.org/uploads/files/2228404029.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/25593904366.pdfIn PDF document text
    • http://sakesushilakehavasu.com/uploads/files/jipokokilorupuvukoguw.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/71128169543.pdfIn PDF document text
    • http://xinchenfast.com/upload/file/wovadusabuli.pdfIn PDF document text
    • http://servis-hradec.cz/files/file/babuzovusewofife.pdfIn PDF document text
    • http://everintelconsulting.com/upload/file/202109020302082906.pdfIn PDF document text
    • http://15441707.com/data/board/file/20210915160732.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=beyond+hr+the+new+science+of+human+capital+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_off0000f8d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D2 11236 bytes
SHA-256: 2bfe936765870d6d5c03f4c5103c4662ab8629bb32c4c405eb2bc046777f27fb
font_01_sfnt_off00011319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11319 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2B 21660 bytes
SHA-256: df41d7aeb306d0cc84b84ef4919cfc35e45c1c83bf2135f1f63ebbf61066d7fd