Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5b9f34bf29fc0cb…

MALICIOUS

PDF

86.5 KB Created: 2021-04-05 06:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03e13d41c4c8c64bad49d1156e195b5c SHA-1: 53184c4ed6075bab113bdb8d06f0c73e72a61e64 SHA-256: e5b9f34bf29fc0cbb9070e7a80632e0ee1abd8ffe6b6f86e68db615ed75c6c7c
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains an embedded URL that leads to a domain known for hosting malicious content, likely intended to trick users into clicking it. No scripts were extracted, but the presence of external URIs suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/wix?keyword=trig+cut+ups+difficult+version+answers
    • http://dvestideyli.xyz/wivizubobelaxebokoxamogufdvnt0.pdf
    • http://fuwimel.22web.org/punjab_textbook_maths_class_11.pdf
    • http://pokypka.xyz/733812308532jdxe.pdf
    • http://copyright-infringement.business/wedupuvarxtli.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_75a37b23fb2f4f75ab84ebef0e1783bf.pdf?index=true
    • http://xuxamasisovuku.epizy.com/what_is_restriction_2_on_a_drivers_license.pdf
    • https://s3.amazonaws.com/retobifulipo/zowewotinasibe.pdf
    • http://desiwafinu.epizy.com/dubeku.pdf
    • http://borowif.epizy.com/77095009721.pdf
    • http://suremosanox.rf.gd/biriyani_tamil_songs.pdf
    • https://s3.amazonaws.com/remeranexe/kanemizus.pdf
    • https://b5c4f4dd-ae1f-4f6a-908c-f463551224e4.filesusr.com/ugd/dafd60_3a83b982a06c4229a61d9425e8f33f95.pdf?index=true
    • http://ritarejameja.epizy.com/wawerot.pdf
    • http://vifiketufo.epizy.com/april_2020_calendar_kalnirnay.pdf
    • http://dimizisunope.epizy.com/equations_of_state_of_real_gases_and_critical_phenomena.pdf
    • https://s3.amazonaws.com/xokebore/vokajarovamodi.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_off0000d88d.bin
27f5c78afd2a0bd454637cc35baaa95c3aa7243bcf400c8b94ec6a944a5daac0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD88D 5424 bytes
font_01_sfnt_off0000eb2b.bin
5bbfb71e7e79db7713d2dca3d61a529cd6bdf2162d19a91745b024a6fee9cfc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2B 2048 bytes
font_02_sfnt_off0000f408.bin
408097ed6c3f9d4be0721884d5f52891558b23a40efea10f77de0f00f6e2a571		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF408 17692 bytes
font_03_sfnt_off0001299d.bin
56964fffbfbf0bc15551f2f7684a2c6dea3906ac7546bc69fdc03d41479f1c8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1299D 19556 bytes

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