Malicious PDF — malware analysis report

Static analysis result for SHA-256 161e6a91b59ca348…

MALICIOUS

PDF

80.3 KB Created: 2021-03-19 08:10:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 0b5ce0358a470e073a02966728608223 SHA-1: c31c034b7f10ec9d7bd56da11862ce0c2250d5d8 SHA-256: 161e6a91b59ca3483d22c070af86563534b5a512bfa1d5fe827aaaef7bb89ecf
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body is heavily obfuscated, but the presence of the external URI and the malware detection strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/wix?keyword=puritan+plain+style+notes+and+quotes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403264/normal_6014bba50fdfd.pdfIn PDF document text
    • http://leaninrzpd.site/91728453817avicj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417212/normal_5fcc8b046ede7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384825/normal_6030304cc2a15.pdfIn PDF document text
    • http://good-production17.site/46827904913kakku.pdfIn PDF document text
    • http://imkl-checker.com/5820431812477ltc.pdfIn PDF document text
    • http://domuxiwedazov.22web.org/simarofig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457862/normal_6010634c6f8c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456387/normal_60449f3ee5ede.pdfIn PDF document text
    • http://familyit.pro/yugioh_dark_magician_girl_card_sleeveso6qgs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/bus_accident_report_writing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f90093d4-58f3-4e2b-9319-ff17428ab009/vet_science_cde_study_guide.pdfIn PDF document text
    • http://kejutox.rf.gd/machine_learning_papers_for_beginners.pdfIn PDF document text
    • http://zetiguseje.rf.gd/30703910254.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/sagiwomesikagof.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/jock_culture_bedford_reader.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/what_is_a_safe_area_to_stay_in_new_york_city.pdfIn PDF document text
    • http://mibenovelu.epizy.com/bio_data_form_for_job_application.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/lenovo_thinkpad_t430s_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/broadcast_media.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/how_to_delete_talk_to_me_in_korean_account.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/95499064970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98d97afe-8bc3-43e7-a1b4-81fdc81a7a3a/can_you_become_a_lawyer_with_an_international_relations_degree.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/sonaladarutewirufudanuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/router_meo_alcatel_mw40v_manual.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_off0000fe59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE59 5184 bytes
SHA-256: 107d25b84eca9bd76c40c7ae8f39487113b025c368bbcbfcb90bd9a97a9d50a3
font_01_sfnt_off00011008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11008 10408 bytes
SHA-256: 504f242f1517cf3a588732f7fdca43e08861bcf222fd8d7412b5e0373a4158f5

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