Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada753b48f07d932…

MALICIOUS

PDF

94.0 KB Created: 2021-04-03 20:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ab738092654b6960cb17058bcf099ed SHA-1: 54b4cf28bf2479a82892558f3aa8466245ec68b2 SHA-256: ada753b48f07d9327d67baac3c25975e983ed88d410255d9e897170b7d868f69
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The document contains a large number of embedded URLs, many pointing to disposable domains, suggesting a phishing or link-farming attempt. While no scripts were explicitly extracted, the presence of numerous external links and the overall detection profile strongly indicate malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/123?utm_term=heavy+weight+bhangra+song++djyoungster
    • https://cdn.sqhk.co/wazotifuk/gKJORIw/general_electric_microwave_repair.pdf
    • https://cdn-cms.f-static.net/uploads/4480898/normal_5fda4527d0c95.pdf
    • http://koparikamoze.scienceontheweb.net/busedepebaresikana.pdf
    • https://mejebepagomuda.weebly.com/uploads/1/3/4/4/134494428/7132e7.pdf
    • http://winovigamaj.mygamesonline.org/sunozuweparirixe.pdf
    • https://cdn-cms.f-static.net/uploads/4495531/normal_6041b0a81d4ff.pdf
    • http://xagidodovinudu.iblogger.org/equitas_holdings_ltd_annual_report.pdf
    • http://ziwusis.getenjoyment.net/west_bengal_election_result_2020_download.pdf
    • https://static.s123-cdn-static.com/uploads/4420448/normal_60031feb6d1c6.pdf
    • https://xaxibilezulaf.weebly.com/uploads/1/3/4/0/134096047/kavexuzawijot_lufefewekusexaw_bajorup_dupafenedexaze.pdf
    • https://cdn.sqhk.co/tatudawo/ghjgRib/black_mens_hairstyles_for_short_hair.pdf
    • https://wurilulisewanid.weebly.com/uploads/1/3/4/7/134728532/50a901.pdf
    • https://static.s123-cdn-static.com/uploads/4367950/normal_5ff3bdc2bcf41.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wuduzinemaz.rf.gd/adosphere_2_livre_du_professeur.pdf
    • https://s3.amazonaws.com/tobito/management_information_systems_mis_examples.pdf
    • http://lajovaputap.myartsonline.com/83944273506.pdf
    • https://s3.amazonaws.com/muxozuvalubi/1868419897.pdf
    • http://roninifuwevol.rf.gd/wozivoruxi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f17f.bin
9cb3c17eeeffd407749262484b548f1daa5aa99b99856a7df92e6f1c47a10a6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF17F 13580 bytes
font_01_sfnt_off00011acd.bin
53d417a554207f0cb93c39fc73f381298e46f2624acddeb97c1f262eb99d8f1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACD 5484 bytes
font_02_sfnt_off00012d85.bin
3a8d3fbe8bba7fdd9200a99e57e042ddf8a1d193cbc17fc63553a101f8aa80cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D85 11708 bytes
font_03_sfnt_off000155bd.bin
9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x155BD 16036 bytes

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