Malicious PDF — malware analysis report

Static analysis result for SHA-256 276149d2c405b5cc…

MALICIOUS

PDF

100.0 KB Created: 2021-03-23 22:49:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 438272b6e1281978aa8ecddfc113ab26 SHA-1: 5b433210148615126b496a3cf2f7a5f6e2f59da8 SHA-256: 276149d2c405b5cc8cd840e3c03680c35912fe2937cc6691886cb7da532a3578
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to be a lure related to a specific topic to encourage clicks on the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://vilenefex.ru/award?keyword=el+establecimiento+del+federalismo+en+mexico+pdf
    • http://lilubaxubaxulu.sportsontheweb.net/jifibazufikoxabofa.pdf
    • http://wigageturuv.mywebcommunity.org/lexitomavizo.pdf
    • http://vixemifojetinag.sportsontheweb.net/2493440233.pdf
    • http://lorewipa.scienceontheweb.net/98941498577.pdf
    • http://ronifibofizet.medianewsonline.com/96399052719.pdf
    • http://kobivoweder.mypressonline.com/meal_plan_for_bulking.pdf
    • http://rosativiwam.mypressonline.com/vilixalajixebigawifag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/48c1c118-9f76-474e-a37d-2a1cbdf813f8/31615110976.pdf
    • https://uploads.strikinglycdn.com/files/e236a9ac-1f48-4d81-9cfe-9feac47b5d5f/gre_words_list_app.pdf
    • https://uploads.strikinglycdn.com/files/7cc80898-79b5-4cfe-9ee6-2b61b9aeba04/79963342952.pdf
    • https://uploads.strikinglycdn.com/files/bce29e97-af26-4620-8d5e-7c2e7a971f27/the_eyes_of_the_dragon_book_review.pdf
    • https://uploads.strikinglycdn.com/files/f92c4228-9c88-4761-ade7-2457e6f0b148/14940704948.pdf
    • https://uploads.strikinglycdn.com/files/0307ab6b-9556-4394-9d2f-4767ef6905f6/how_to_pair_anker_soundcore_headphones.pdf
    • https://s3.amazonaws.com/nuselufuzo/xadukejekanenexala.pdf
    • https://s3.amazonaws.com/bopuxosavubare/carer_allowance_claim_form_centrelink.pdf
    • https://uploads.strikinglycdn.com/files/24546bb1-876c-4458-b7b5-a9ad66720276/for_dummies_logo_png.pdf
    • https://uploads.strikinglycdn.com/files/02dca880-6522-4a25-ac94-d0d12e858d6a/sharn_city_of_towers.pdf
    • https://uploads.strikinglycdn.com/files/faae1331-7a30-409b-adda-a4c592220d74/25239504474.pdf
    • https://uploads.strikinglycdn.com/files/be40aeb3-2a1b-483d-ac44-e28eec1e815e/dajeju.pdf
    • https://uploads.strikinglycdn.com/files/4d56757d-6581-4450-a436-187075cf4a17/ring_doorbell_plug_in_chime_not_working.pdf
    • https://uploads.strikinglycdn.com/files/239afe0a-c701-4ea6-b057-ee8be51c1a3e/ethical_hacking_degree_course_in_kerala.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_off0001388f.bin
61723b1b6017067a864fd630c8f3c5c5da14d4914ad01f9a3b087ccd0e8e8d6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1388F 5252 bytes
font_01_sfnt_off00014a4b.bin
73ef62ce7e920aab8958d941cebdd5b501ecc14b01194e8cb485cb44a36eff75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A4B 12300 bytes
font_02_sfnt_off00017253.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17253 4324 bytes

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