Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac478d92fa7c406…

MALICIOUS

PDF

75.4 KB Created: 2021-04-04 21:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee205ee2fd6ea200d415d8ff36d15e26 SHA-1: d1a74cb1cfa2fb6aff2465b21493fd283f06c1a2 SHA-256: 1ac478d92fa7c406c0fb0734e6b1d261c8b2dfeea8324af60de028e95fa30264
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to a URL that suggests a file conversion service, likely a lure. The presence of embedded URLs and the ML classification strongly indicate a phishing attempt designed to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soxebez.ru/award?keyword=convert+adobe+pdf+file+to+word+document
    • https://cdn.sqhk.co/bixatavafut/gibgihb/wipixefevunukekakubolodo.pdf
    • http://fotubobuwenapu.scienceontheweb.net/botilonozaruwazavuleg.pdf
    • http://ourfutures.space/77317647816pbdlr.pdf
    • http://urott-hu.com/honda_motorcycle_parts_list_australilkyg8.pdf
    • https://cdn.sqhk.co/godidudawat/6hdBPih/server_rack_dimensions_45u.pdf
    • http://bobr.space/libro_el_arte_de_la_guerra_maquiaveloha2yz.pdf
    • https://cdn.sqhk.co/fakomuse/dOjchey/earth_3d_world_atlas_free_apk.pdf
    • http://fafabil.getenjoyment.net/27003697014.pdf
    • http://fofumumitem.medianewsonline.com/jisevowefatamaji.pdf
    • http://kevufeduwatawos.mypressonline.com/rijizarezewegemosaviwep.pdf
    • https://cdn.sqhk.co/monazaxumol/9jfW6QR/manor_cafe_hack_mod_apk_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jidosatikim/32441103978.pdf
    • http://fetekovabu.onlinewebshop.net/pujamedogujepiviga.pdf
    • https://s3.amazonaws.com/fexuror/talolaz.pdf
    • http://xasagode.myartsonline.com/91399571232.pdf
    • https://s3.amazonaws.com/nisiwanolom/shared_calendar_app_for_android.pdf
    • http://petojijoxura.onlinewebshop.net/how_do_you_clear_error_codes_on_samsung_refrigerator.pdf
    • https://s3.amazonaws.com/pobixedele/sanesujiz.pdf
    • https://s3.amazonaws.com/likerajatob/xivojililonane.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e95e.bin
70e98f31893fd3dd7b4c44bbb863378926833069a187e0a08ce9ea0779cac29c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE95E 5320 bytes
font_01_sfnt_off0000fb72.bin
f1bba26f1fd9499b3645353a2ae3ccf07a49993ce944a9a198b55c6e028272de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB72 10912 bytes

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