Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a4f80e1256cdaa4…

MALICIOUS

PDF

92.1 KB Created: 2021-03-14 11:31:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7258f56548c1cf9b17217f972e6d28b3 SHA-1: 75f5039ac0e1dcee2be210e5bdbaebd1f84f6a7f SHA-256: 9a4f80e1256cdaa47c7f2a8b7c3e81c1b0d45059573d9fe66275317036f65be6
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious URL, suggesting an attempt to redirect the user to a malicious site. While no scripts were explicitly extracted, the presence of external URIs and the nature of the detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/award?keyword=aditya+hridayam+stotram+odia+pdf
    • https://static.s123-cdn-static.com/uploads/4481403/normal_5fefdfd7cf2cb.pdf
    • https://cdn.sqhk.co/sivadapexiri/gujiijS/44564728965.pdf
    • https://static.s123-cdn-static.com/uploads/4476780/normal_5ff7809d95fff.pdf
    • https://static.s123-cdn-static.com/uploads/4501996/normal_5ff20f66262db.pdf
    • https://static.s123-cdn-static.com/uploads/4367631/normal_5fc5e570584b8.pdf
    • https://cdn-cms.f-static.net/uploads/4366358/normal_60223c24b5d30.pdf
    • https://static.s123-cdn-static.com/uploads/4466173/normal_5fe240ce7af7c.pdf
    • http://timurberg.ru/17239960803cb9eq.pdf
    • http://sallely.xyz/finutepusipumuwejuniqyt.pdf
    • https://cdn-cms.f-static.net/uploads/4379377/normal_6022c19976f7b.pdf
    • https://cdn-cms.f-static.net/uploads/4369648/normal_60477f4973974.pdf
    • https://static.s123-cdn-static.com/uploads/4421333/normal_5ffd2543d14aa.pdf
    • https://cdn-cms.f-static.net/uploads/4482190/normal_602c90669c38b.pdf
    • https://cdn-cms.f-static.net/uploads/4491946/normal_604813226575c.pdf
    • https://cdn-cms.f-static.net/uploads/4387921/normal_604ab055cf4af.pdf
    • https://cdn-cms.f-static.net/uploads/4380545/normal_604016a50dc47.pdf
    • https://cdn.sqhk.co/relulapezele/djhgclS/kenanolevufifeg.pdf
    • https://static.s123-cdn-static.com/uploads/4368242/normal_5ff311613a2dc.pdf
    • https://cdn-cms.f-static.net/uploads/4485943/normal_5fda388a8436c.pdf
    • https://static.s123-cdn-static.com/uploads/4410459/normal_5feff388364f9.pdf
    • https://cdn.sqhk.co/rasetiwulipu/sghhev1/gingerbread_run_game.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • 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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f451.bin
e6007ebb8513e9fc206791338ecc6e02c351c3ac5e5f0798b40ccf77fba6bbef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF451 5340 bytes
font_01_sfnt_off00010656.bin
b850e935aaf604f3e1824861b6c46746957ce6d0e1401f4bf16d070b42224529		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10656 3772 bytes
font_02_sfnt_off000111fa.bin
7528cde7a7ae4cbf7f487369303a4c7fbb1563946b25a6a5bffe0f051a77ff68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111FA 10612 bytes
font_03_sfnt_off00013650.bin
5288193e564d45d2bdb70143ff1e191f8ea110692452393d9e39b34676359739		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13650 14396 bytes

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