Malicious PDF — malware analysis report

Static analysis result for SHA-256 397a4cab03057924…

MALICIOUS

PDF

76.7 KB Created: 2021-03-24 20:46:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92efbbe479d582373720e1b38db852ae SHA-1: f3a7170135e49692a2973c37a0ea4f1d661aad9a SHA-256: 397a4cab03057924e240fb22dcfc2debf63fdeecbdb01f5bca34f5c350cb2afe
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a domain that is likely used for hosting or distributing malicious content, disguised as a user manual. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/wix?keyword=fire+tv+stick+4k+manual
    • https://static.s123-cdn-static.com/uploads/4493578/normal_5fff30dcdd3dc.pdf
    • https://cdn-cms.f-static.net/uploads/4408333/normal_604f8700ce400.pdf
    • https://nuribivavis.weebly.com/uploads/1/3/4/6/134625990/bde6b.pdf
    • https://cdn.sqhk.co/kopilixa/jrijI9r/12588679466.pdf
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/5128657fbfa891.pdf
    • http://xojitufos.66ghz.com/21067658596.pdf
    • http://nakaxovatixokew.22web.org/56430509519.pdf
    • https://bewimowijukoja.weebly.com/uploads/1/3/4/5/134584545/3567322.pdf
    • https://romadixisom.weebly.com/uploads/1/3/2/6/132681692/jujituvad-negerivubuxoxiz-foxunemo.pdf
    • https://cdn.sqhk.co/zenipijujate/dgehbje/97443531495.pdf
    • https://cdn-cms.f-static.net/uploads/4408720/normal_5fda67c2baa5a.pdf
    • https://cdn.sqhk.co/vefapatape/hioCgiy/naxojil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/19d9df74-2c79-4338-bb64-78768930eef4/how_to_install_windows_7_from_usb_step_by_step.pdf
    • https://uploads.strikinglycdn.com/files/920a8c08-0fc1-4bde-9b4f-bc3ceed61998/rumipilofugapepivofasofaf.pdf
    • http://zutadefado.epizy.com/why_is_my_2007_chevy_equinox_overheating.pdf
    • http://xipokawopigigig.epizy.com/98871868665.pdf
    • http://mujodefifotufe.epizy.com/the_river_cafe_brooklyn_menu_prices.pdf
    • https://uploads.strikinglycdn.com/files/9eac1483-606c-4f70-a93f-416fff7556ed/how_to_interpret_words_their_way_spelling_inventory.pdf
    • https://uploads.strikinglycdn.com/files/bc7bb845-2310-4e56-9e04-86f9ef04fd0b/sharp_alarm_clock_manual_walmart.pdf
    • https://uploads.strikinglycdn.com/files/a23a5bc3-0ccf-4bde-9ab0-d6d3a6f4c337/how_to_use_a_star_finder.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e147.bin
b208951176d38dca0704852532f2334ae49a57951d8cf5ae9069b6af86cc9491		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE147 4884 bytes
font_01_sfnt_off0000f1d0.bin
c45ea9d80806d3047c487424a5cbe65813929c254a8c298686c48c2236716fad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D0 11172 bytes
font_02_sfnt_off00011791.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11791 4324 bytes

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