Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd948ea1fbc315d…

MALICIOUS

PDF

72.5 KB Created: 2020-12-19 13:53:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cf610fd49c0907c606f4a1d0ebb7ce8d SHA-1: 96679602d7226c7298f49261672f34119e66e2bb SHA-256: 3cd948ea1fbc315d79202ab56c41377a644df96ce2dcf0a701781e53a7cd0cb2
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafftec.ru/123?utm_term=north+brunswick+train+station+cancelled PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c847bac-25b5-4565-9c1c-aa264d9e2b6b/35150924420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c622be5a-431c-4b12-b528-c2a120fba5cf/patetasovosikavomal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e1650e0-14fe-4bda-b3d6-8931150c5a16/fitalifaxesodifuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adac0182-dc2c-4893-9a89-21500624cda7/tulibrodefp_fol_solucionario_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/pampered_chef_popcorn_maker_tips.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08391f80-8e87-4cfa-9875-bc02406f4709/99793889237.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd08e9dae50a014588dd44/1606224106605/mennonite_white_head_covering.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc106fbd49dd1244734cdd3/t/5fce7660e1d25c33964d3b06/1607366242964/music_tiles_3_ad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9e8e28b-244b-450e-b7a5-ef2136661353/wwf_roster_1985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4056ea5-0b1f-4dba-9bba-d6415ae46f66/pratik_ingilizce_konuma_klavuzu_pd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72069242-95ae-4c8f-a506-febaba982656/synonyms_for_notebook_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/tower_defense_games_minecraft_hacked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fa91a9d-5835-4fe5-b858-11497f80809b/pesegarigewokukebanifoji.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/cambridge_university_press_exam_copy_request_form.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/building_construction_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bde48957-2917-473d-9b5f-fa6b6ed45864/nitro_apk_iptv.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_off0000ddce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCE 5292 bytes
SHA-256: fa2ba033426687991847d6564d6b3296d78d3abcde4f04979b55f0724adb2dc5
font_01_sfnt_off0000efdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDD 11172 bytes
SHA-256: 901b759af1b53122d79f50973132ff3851f59b8fe99abb0b6a25226de7ab4d60

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