Malicious PDF — malware analysis report

Static analysis result for SHA-256 2609926da59f934d…

MALICIOUS

PDF

74.6 KB Created: 2021-03-27 10:51:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 906c70ad22463f44c604e28b208ae4d1 SHA-1: 98cc5149f12cf07ccc05638a0c06ebce082c4293 SHA-256: 2609926da59f934dde2afd54b5269f04edba527945b47dc342a7030f2db43cf5
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to exploit vulnerabilities or trick the user into visiting a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://golowaki.ru/123?utm_term=bruxelles+formation+bf+langues+1000+bruxelles
    • http://blubadgehelp.net/88943535517du69l.pdf
    • https://dowoxadi.weebly.com/uploads/1/3/1/3/131380004/3720477.pdf
    • http://carinsusa.com/mejor_universidad_de_bogota_en_psicologia11tvn.pdf
    • https://cdn-cms.f-static.net/uploads/4458388/normal_604b19b398730.pdf
    • https://putumilaw.weebly.com/uploads/1/3/1/3/131380263/566d518.pdf
    • http://marinarus.space/86865117761rejti.pdf
    • https://static.s123-cdn-static.com/uploads/4468255/normal_5ffd0b45cfc76.pdf
    • https://tisawisapapaw.weebly.com/uploads/1/3/5/3/135326074/kujojutosoju_wukuv.pdf
    • https://cdn-cms.f-static.net/uploads/4501383/normal_601ba704b39bb.pdf
    • https://wojopukutipu.weebly.com/uploads/1/3/4/3/134345686/de3cfc24e0a3.pdf
    • https://cdn-cms.f-static.net/uploads/4462374/normal_603a566f0a165.pdf
    • http://turistik-a.ru/texas_zip_code_fort_worthnhuu4.pdf
    • https://cdn-cms.f-static.net/uploads/4380705/normal_6022b025122e0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8ec933f3-da2f-407b-8bdb-bfaec5f653a8/whats_the_best_thing_on_arbys_menu.pdf
    • https://uploads.strikinglycdn.com/files/9f38b1ab-79f5-4092-9946-11c588f01bdd/singer_touch_and_sew_model_603e_manual.pdf
    • http://punejiva.epizy.com/english_to_amharic_dictionary_free_download.pdf
    • https://fc06435f-e709-4c80-b59d-96fa470c1a13.filesusr.com/ugd/bdc04d_00fab76eb1e24b689ec6e827a40f0c82.pdf?index=true
    • https://f1801c53-b3f5-4b94-a9b3-4bb8eb376a66.filesusr.com/ugd/af633f_4346a47e6e4540f2a4f474d434efbbfe.pdf?index=true
    • http://guwivuvasexi.epizy.com/36423859154.pdf
    • http://xunurevi.rf.gd/cambridge_english_proficiency_2_student_s_book_with_answers.pdf
    • https://uploads.strikinglycdn.com/files/14b23657-034e-46f2-9c34-2446d362d627/batman_vs_joker_dark_knight_full_movie_download.pdf
    • http://bigisewolax.epizy.com/zevuxigizanexujar.pdf
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_4cb7da231e854333a46c3df3fb0647cd.pdf?index=true
    • 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_off0000dfa3.bin
669f71850d894398c679886f2ddb6c33f08040e5680f98cc67734011f0b3fdb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA3 5536 bytes
font_01_sfnt_off0000f26e.bin
e86eaa54ea34b5246de21b22229985aff519a59456c8e5c48fdc4665a5351991		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF26E 12780 bytes

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