Malicious PDF — malware analysis report

Static analysis result for SHA-256 e96c24bd4fdcb002…

MALICIOUS

PDF

69.5 KB Created: 2021-03-27 19:56:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 86a718a90d53f4499887447ca7dd5622 SHA-1: 588109bf23efab566d897cfdc9f22fbdd7a44111 SHA-256: e96c24bd4fdcb002c16cd8dbb397c0fb5e72d0efbe0c167271ed53c29fbcc8b3
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The document body, though heavily obfuscated, suggests a lure related to course answers. The presence of an external URI indicates an attempt to redirect the user to a potentially harmful site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=cpm+course+1+chapter+2+answers PDF link annotation
    • http://pupezawat.scienceontheweb.net/doctor_sleep_movie_stephen_king.pdfIn PDF document text
    • https://cdn.sqhk.co/niririga/fhbOhaR/xeremobefi.pdfIn PDF document text
    • https://cdn.sqhk.co/wudajelu/snhi4gj/gewukivowatovigoj.pdfIn PDF document text
    • https://cdn.sqhk.co/tezasevimab/NxjggNj/parentvue_egusd_sign_up.pdfIn PDF document text
    • https://cdn.sqhk.co/monazaxumol/j3IB8hh/paromo.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/hbNjeyj/tekeruxal.pdfIn PDF document text
    • http://filozajerezabi.getenjoyment.net/filipino_bread_recipes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/73f3b43f-a39e-4130-9ef1-f05826144217/dark_souls_2_scholar_of_the_first_sin_bosses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/203f7c62-16d1-4741-9b99-1235ebe88275/36066114369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11d30508-d2db-4f88-9da4-f3b88e48b34c/27258507680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba934bfc-f56a-471b-8b6e-0484112d2bdd/big_little_lies_season_2_recap_episode_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cef7cc30-84a7-4d16-8aa1-5a8899fbec95/591252355.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c30f3b5b-1e18-40d1-9630-385632c78adb/8648973075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ca337b6-8abe-4314-8fde-414539c4bad1/makog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/988b4df8-40ea-47fa-b289-ae56d93bc23c/wikutadifenenaramifinaxew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0692c2d4-bfa0-4f50-a44b-bd5df741daf5/sawuporiwotofog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50308a0d-b9ec-4f50-9e4b-ab09e7afb678/al-quran_bangla_english__arabic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5628e2de-a021-4f09-a93f-c1bbc726621d/cuisinart_grind_and_brew_12-cup_black_and_chrome_programmable_coffee_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fc21bcf-593f-4750-bc7e-5e8ce52c544c/how_to_interpret_eu_law_oscola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a99d93c3-0e21-4d99-ae1a-9ed31ab01d6d/18469159612.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d03b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD03B 5320 bytes
SHA-256: 0db140ba6724d0cb5cd96bfde0239559d4cd3658ecc1405b584045bd63bfa1e2
font_01_sfnt_off0000e23c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23C 10880 bytes
SHA-256: 545400d1ff5ecf6d61dfaf36969b93ce4d632994fb9ee732135f68e7bf6f6552

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