Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dc55c4862c45a34…

MALICIOUS

PDF

79.8 KB Created: 2021-02-22 05:31:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 07064d6dd48c1fec70b68f212d09a3c3 SHA-1: d456ff37d2e8fe0ad30b23659bdc01dacf937def SHA-256: 8dc55c4862c45a342eb72f7ed008df5f7450801a547320e2ab5f50568e8e24e1
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 URL, identified by both heuristics and ClamAV detection as malicious. The ML classifier also strongly flagged this PDF as malicious. The primary URL, https://jottigo.ru/wix?keyword=devolution+ap+human+geography+frq, is likely used to host a phishing page or download a secondary payload.

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://jottigo.ru/wix?keyword=devolution+ap+human+geography+frq PDF link annotation
    • https://cdn.sqhk.co/viforoge/hbUgdhj/31498292210.pdfIn PDF document text
    • https://cdn.sqhk.co/mogowepuw/hbkgdhi/76582618204.pdfIn PDF document text
    • http://front-glass.website/8794201315vmri0.pdfIn PDF document text
    • https://cdn.sqhk.co/vemudumuxixu/giShd9n/teddy_bear_hd_wallpapers_1080p.pdfIn PDF document text
    • http://itrom.fun/electrochemistry_practice_test_with_answersem51w.pdfIn PDF document text
    • https://cdn.sqhk.co/rinilafexowi/g4widia/-_34.pdfIn PDF document text
    • http://m-ryanaf.site/94791673893889za.pdfIn PDF document text
    • https://cdn.sqhk.co/tupipitijil/rsvM4gc/pupisepukafivipizez.pdfIn PDF document text
    • http://wgathering.org/encyclopedia_of_evolutionary_biology2w8iy.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/hhfEgdM/road_rash_3d_rom.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/jivala/46814247145.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/7532254998.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/21884509142.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/69926782491.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/kisekiwobilabebezuv.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/cloud_foundry_cli_reference_guide.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_off0000f21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21D 5424 bytes
SHA-256: 9bd8c8e5989f0cbcd292db88492b759436ee008b88034bc76c2a3d2385ee848c
font_01_sfnt_off00010472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10472 1716 bytes
SHA-256: 7314a8110a688275e79cb4cd5cd058a9f858becaa7f01fde0a687197ddc85302
font_02_sfnt_off00010cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFD 10604 bytes
SHA-256: dfd80badc08b4abd65c98a085e112658b524235909bfedc766d4119b45e8b46a