Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea2e461eb734ae4…

MALICIOUS

PDF

76.3 KB Created: 2021-09-18 20:29:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 397d0331f61b0f23c3fad1eefbe27824 SHA-1: b0b7218e98acdef5c5f747d4da5a89e0b7a4a597 SHA-256: aea2e461eb734ae4b866f913e82d105a23b170f9a97457bb8bc5fc1f1ee6a5e8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to potentially disposable hosting, suggesting a link farm or redirection mechanism. The PDF structure and heuristic firings indicate it's designed to lead users to external sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://bptramptour.pl/files/file/xelosijug.pdf In PDF document text
    • http://opuspoint.com/ckfinder/userfiles/files/werawewifafamubole.pdfIn PDF document text
    • http://vstarmp.cn/upload/files/20210906_153049.pdfIn PDF document text
    • https://bisleriwheel.genefied.co/ckfinder/userfiles/files/rurekodarapoxavug.pdfIn PDF document text
    • http://metabolitplus.ru/files/file/fefebenit.pdfIn PDF document text
    • http://sangtaoad.com/uploads/userfiles/file/10098876213.pdfIn PDF document text
    • https://evabizz.com/userfiles/file/82670825875.pdfIn PDF document text
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/51699865728.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/91557928661.pdfIn PDF document text
    • https://stancijanegrin.com/userfiles/file/pirasejanewowusozol.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/69449851022.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/23457405824.pdfIn PDF document text
    • http://chiari-web.com/ckfinder/optimist/files/geniwutotaboribozibog.pdfIn PDF document text
    • http://madurastones.com/userfiles/file/89534292335.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe7eb5afd9---zixafetaw.pdfIn PDF document text
    • http://www.iciparis.ru/ckfinder/userfiles/files/65657728025.pdfIn PDF document text
    • http://secondhandgraphics.com/usrfiles/file/kodebano.pdfIn PDF document text
    • http://krukaiart.com/userfiles/files/nanapetasaku.pdfIn PDF document text
    • http://daiichibus.vn/uploads/news_file/84561179300.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/ddd247590419de719d07c834b4e739b0/paxudowakomagegiruzil.pdfIn PDF document text
    • https://uslugiinzynierskie.com/eurostyl/photos/file/86465823629.pdfIn PDF document text
    • http://sanfrancescovet.com/userfiles/files/33244249528.pdfIn PDF document text
    • http://frickcontrols.com/uploads/files/jobolib.pdfIn PDF document text
    • https://duhocblueocean.vn/ckfinder/userfiles/files/5309940747.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=the+boss+michelle+darnellPDF 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_off0000c77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC77C 17132 bytes
SHA-256: 308d63199547ea04088026351d1dde735aa868c829fa393f5b113923b6b09393
font_01_sfnt_off0000f399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF399 10640 bytes
SHA-256: adf4f2dda560ee438d0df1dbcfd8fc6b6c944370bf15f962b37e04f24dca81e6
font_02_sfnt_off00010bb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1