Malicious PDF — malware analysis report

Static analysis result for SHA-256 144ea01bfb424f04…

MALICIOUS

PDF

78.5 KB Created: 2021-09-19 18:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0b9de74d8cc0dfcb327b28b7d713522b SHA-1: 96c4966fae760741a60f661a8d521c61a876508c SHA-256: 144ea01bfb424f041e34f6653aee448c12b53ad3b09b42dbc283e67b48d5df29
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URIs, many of which are part of a link farm on disposable hosting, suggests a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded links are typical of spearphishing attachments designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://philabc.ru/uplcv?utm_term=iphone+12+in+bd PDF link annotation
    • https://iuoshili.com/upload/users/files/vikejo.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/sodaw.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/xuvibunalulivilurozawup.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/fepifegosabekuxorere.pdfIn PDF document text
    • https://clinicaalcantara.es/sites/default/files/userfiles/file/2107903352.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/25667562950.pdfIn PDF document text
    • https://toyotaautobody.com/ckfinder/userfiles/files/4967057017.pdfIn PDF document text
    • http://myphamvickwhitebeck.vn/luutru/files/nuxikisuroji.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16140f2421376a---toxirale.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/79436764184.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/72557695555.pdfIn PDF document text
    • https://tcremich.lu/files/files/buvelu.pdfIn PDF document text
    • http://simonkuehner.de/gfx/userfiles/files/94646906421.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/10175285694.pdfIn PDF document text
    • https://threadworx.com/thread/admin/uploads/file/getejosupatomogivuve.pdfIn PDF document text
    • http://ndfeef.com/radiant/mechimobiles/userfiles/files/xemiten.pdfIn PDF document text
    • https://manhremhoangvan.com/wp-content/uploads/files/kabituvexixanesonurafu.pdfIn PDF document text
    • http://kibbkw.com/uploads/files/gariwelarofudopamena.pdfIn PDF document text
    • https://idea-web.ro/app/webroot/files/userfiles/files/dunonemes.pdfIn PDF document text
    • http://pomelieagency.com/userfiles/files/13061539451.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/06264480f3567517e2cd77c7b1549e0c/19887927771.pdfIn PDF document text
    • https://izometal.net/mm/file/16671072922.pdfIn PDF document text
    • https://balarampurblock.in/ckfinder/userfiles/files/83899774796.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_off0000cc66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47D 10176 bytes
SHA-256: a491c0cf026e7e05ad4e2c580bd6ea1d52557fad42592827351a80988040d74b
font_02_sfnt_off0000faf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF6 18852 bytes
SHA-256: cb7db28b8e5a00d006d3f5c2238d494f4f7bbf1c9367172f92fcb34db9e861d4

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