Malicious PDF — malware analysis report

Static analysis result for SHA-256 70ebabfd5936b7f5…

MALICIOUS

PDF

86.6 KB Created: 2021-02-24 14:43:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: bbf4922ae715fe456b2d10cda7ef880b SHA-1: f65f58c8e3fdef459e6a8e920272b30c9c65a29f SHA-256: 70ebabfd5936b7f5008fa8b9d4f9361f02a9683831055409d0039fc7b487306a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically `https://crophysi.ru/strik?utm_term=2017+ktm+300+exc+owner%2527s+manual`. This suggests the document is designed to trick users into visiting a malicious site, likely for phishing or to download further malware. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/strik?utm_term=2017+ktm+300+exc+owner%2527s+manual In PDF document text
    • https://cdn.sqhk.co/guviterolovu/jizhe1S/std_10_maths_chapter_15_gujarati_medium.pdfIn PDF document text
    • http://wevoselaxoto.66ghz.com/bal_ganesh_wallpapers.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/Zhhidio/download_banana_kong_mod_apk_android.pdfIn PDF document text
    • http://denazofumoxebo.iblogger.org/appendix_in_technical_report_writing.pdfIn PDF document text
    • https://cdn.sqhk.co/jemitaku/78MijC0/canvas_student_app_download_for_laptop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455185/normal_5fdc95640afcc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489853/normal_5fe385939b7d5.pdfIn PDF document text
    • https://cdn.sqhk.co/jenotonolo/clRjdgc/b-_52_bomber_used_in_vietnam_war.pdfIn PDF document text
    • https://cdn.sqhk.co/bebuvasipen/gizYhjt/tanksmith._io_how_to_get_onyx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416154/normal_600f03cda2e14.pdfIn PDF document text
    • http://jinoxiresajigeb.iblogger.org/pelevevinuziguxofo.pdfIn PDF document text
    • https://cdn.sqhk.co/wifavizen/75Mifje/history_channel_vikings_season_5_episode_1.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/Gjjpgid/que_es_el_texto_iconico_verbal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF195 5680 bytes
SHA-256: c54a19ad08eb5a3222da1f677c3b0171324161daac1099f1075417be1152a8eb
font_01_sfnt_off000104fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FA 15972 bytes
SHA-256: ca2b597997c6ffebc0b9737bdd0ca1763b7443fe42cd10f9b9ad404636809ec5
font_02_sfnt_off00013606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13606 16172 bytes
SHA-256: 7eda928f1d85ef24c2672852b1aeffc0553a8a305e18ce932646949c408ee4a8

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