Malicious PDF — malware analysis report

Static analysis result for SHA-256 1140aba1cdee3243…

MALICIOUS

PDF

75.6 KB Created: 2021-03-17 05:59:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f51a6f68d9674a50d07205c747ef1b8 SHA-1: 11015f5b8759255dee74741613f99d30bc142c97 SHA-256: 1140aba1cdee3243456e1fad6066a95759efa4a5d1f6d21486688daeabcce2dd
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm the malicious nature of the file. Although no scripts were explicitly extracted, the presence of external URIs suggests the document is designed to redirect users to malicious content, likely for phishing or to download further payloads.

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://resalured.ru/strik?utm_term=the+umbrella+academy+comic+klaus
    • https://cdn.sqhk.co/fudamozomeb/iS3UGTE/oddbods_turbo_run_mod_apk_1._4_0.pdf
    • http://eagleaff.com/18680600091qf28v.pdf
    • https://cdn.sqhk.co/gojogefe/ijjm2Z9/the_green_glass_door_answer.pdf
    • http://winoorama.website/0661j.pdf
    • http://kakorixow.mygamesonline.org/bunudazafeforisopo.pdf
    • https://cdn.sqhk.co/kekotenonaxu/gfqhi7i/monelolizogewuzenuxazavi.pdf
    • https://cdn.sqhk.co/mevexobuzur/ghb0hdy/free_survival_battleground_fire_battle_royale_mod.pdf
    • https://cdn.sqhk.co/wisewuguv/jjbDgcV/xalukemo.pdf
    • http://francobusiness.com/bengal_tiger_tamil_full_movievxgcu.pdf
    • http://kenugizi.getenjoyment.net/xamume.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://punozelejewi.rf.gd/make_an_atomic_theory_timeline_answer_key.pdf
    • http://nudagimanefej.atwebpages.com/kofulenubujabubupitu.pdf
    • https://uploads.strikinglycdn.com/files/b0f6e477-6a88-4cf2-b7e3-356dc2fc6d2c/sony_dvp-sr510h_cannot_play_this_disc.pdf
    • http://tajiroxajesolut.atwebpages.com/gerhard_kittel_theological_dictionary_of_the_new_testament.pdf
    • http://sebubexegan.rf.gd/64365238336.pdf
    • https://uploads.strikinglycdn.com/files/628ab35b-1a93-4cc8-bba1-f8c916d6ce86/79171829159.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_off0000e950.bin
13153e34bb9fe333ac57de0e7dd638c198958fd80e83b98e1c170d0ee17f7189		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE950 5432 bytes
font_01_sfnt_off0000fb9b.bin
a78e27e34606bf9ee91a1c142eb2f8a6b4d0af67c284873e46e7a51abd977e8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9B 11160 bytes

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