Malicious PDF — malware analysis report

Static analysis result for SHA-256 642cb7fdb2cead56…

MALICIOUS

PDF

66.2 KB Created: 2021-01-04 20:14:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d5c8dc8c40088260f09653993f414f9f SHA-1: 78a9d71cd5d5f75763a5422d79c46116736c3b9e SHA-256: 642cb7fdb2cead5611229e0ba1f9035b92e3f2e8d10b568784506d1832d50e1e
104 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, with a specific detection name indicating it's a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to deliver a payload or redirect the user. The document body, though partially corrupted, suggests a lure related to a 'hall ticket', aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffnew.ru/aws?utm_term=hall+ticket++2018+ignou PDF link annotation
    • https://cdn.sqhk.co/zovigobut/2gnsihw/free_robux_loto_2020_ivm_games.pdfIn PDF document text
    • https://cdn.sqhk.co/fibapezo/Uijcq4w/me_pongo_asi_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/fazovivum/jdJihjc/tegiloselaxum.pdfIn PDF document text
    • https://cdn.sqhk.co/kagurase/W0j8l2I/opera_browser_video_downloader_android.pdfIn PDF document text
    • https://cdn.sqhk.co/guwewaxa/iciadgg/5118881464.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/ajbicjj/zombs_royale_unblocked_io_ground.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/lerezazo/boston_augustana_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/dolby_atmos_apk_no_root_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/zuporamaliwegitado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d42545f3-36e5-4476-9107-0aeadaf61b23/chicco_polly_highchair_poetic.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/booster_seat_guidelines_indiana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/964ccbc3-8516-4c73-b411-d6e662409bfe/project_management_techniques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b4d59ae-75d3-41c4-8eb3-525fd8173a42/wuzusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5793d453-7760-443c-86e3-3a7b874e9b36/mark_8_29_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c30f6690-e753-4ed7-b48d-abe9a4334e06/32160599015.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_off0000c67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC67E 5236 bytes
SHA-256: 87d9065a46737808b4cffec78c3abf65ddb248814fd3888689d7768d3809285b
font_01_sfnt_off0000d869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD869 10520 bytes
SHA-256: 53dc92f552c277d7cbba539763894963edad2a6628e1d9b1afd2ba68188df8ed

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