Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3f49807a568bf5d…

MALICIOUS

PDF

77.8 KB Created: 2021-03-01 14:08:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 81aa96c532c7fc441839a79e4ccc2551 SHA-1: 51a88e61f859f484d921cdbe760d28006fda4773 SHA-256: f3f49807a568bf5dec6b4fdb36bed4c4a0f7656e42a428d0669bd8f761cb68d6
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified as a phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL is likely used to redirect the user to a malicious site for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=.net+c%2523+tutorial+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368782/normal_5fd7b930177e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390999/normal_5fee82630bbbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471455/normal_5fe74b03a3dcd.pdfIn PDF document text
    • http://nokojatagi.mywebcommunity.org/avaya_one_x_communicator_voicemail.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369768/normal_6020ba3e048ac.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/35920174004.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/neziruvas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496811/normal_5feb2d8e1b1c0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xeponodij/cinematic_strings_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/71657540492.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/11103189681.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/non_chronological_report_on_dogs.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/dead_space_apk_androidgamegratisan.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/ansys_apdl_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/hexatech_vpn_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/rilemobomabe.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE187 3116 bytes
SHA-256: 6d23f162e175acbf64c8bc39be27814263e0caa91324515b1a183fa04a908930
font_01_sfnt_off0000ec9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9B 4212 bytes
SHA-256: 2acba1ffaa0114d24c47f70fb85206912b6934e11cfb657125fdee2d8670e730
font_02_sfnt_off0000fb05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB05 15168 bytes
SHA-256: 9c297a32232f4be7dd3b3d5908e92bb806620c294312d0c7926e2586fe252662

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