Malicious PDF — malware analysis report

Static analysis result for SHA-256 469820423142058f…

MALICIOUS

PDF

91.6 KB Created: 2021-03-10 04:48:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6327012a88b0ca39b707ddd2f9a48dd1 SHA-1: 903039162ca9d62ba1804075069cf9a0228929d6 SHA-256: 469820423142058fc7303c60ef9f17279af9b990379ce321cc84305dc7d69691
156 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were extracted, the embedded URLs are the primary indicators of malicious activity, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/award?keyword=canon+7d+mark+ii+specs+pdf PDF link annotation
    • http://itsamorem.com/gopazalibusajanobejujakuki4ei.pdfIn PDF document text
    • http://zelenege.iblogger.org/college_physics_a_strategic_approach_3rd_edition_solutions_manual.pdfIn PDF document text
    • http://jakartapro.xyz/baul_gaan_song_video9owom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d52aed46-be45-4f9b-8106-cf6fc7ee66c0.filesusr.com/ugd/b148e5_c87a23453e074b3a8c9610e58c9851c2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/746726aa-58d9-4539-899e-01311b81bbdf/92463854080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/479f32db-375d-4992-899c-918b305465ca/attack_on_titan_season_4_manga_box_set_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/49422957619.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77801793-8980-42c5-afce-b729e5f902e5/goodnight_moon_words.pdfIn PDF document text
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_dd0cfba7d040437bb57674acfe3e67d2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/movimiento_rectilineo_uniforme_ejemplos_fisica.pdfIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_0651de21f3904e6db67f19d924a7a2bb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/cqc_report_maples_care_home_bexleyheath.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/69060292031.pdfIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_3642dc06ee1543fa9c282f266c5d3461.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mamibis/business_strategy_template_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/94414706573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de44327d-9680-4f38-a692-1d8ce6cf8f21/english_grammar_betty_schrampfer_azar_fourth_edition.pdfIn PDF document text
    • http://xujalupa.epizy.com/cif_cream_cleaner_safety_data_sheet.pdfIn PDF document text
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_2c2556b6c0124e9d93ff83c6e43c764e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/what_are_the_advantages_and_disadvantages_of_a_mixed_economic_system.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AA 3844 bytes
SHA-256: 5ae11ae775997a480a279a77b428feac1195f3a121e28d7473eb1bf077e0633f
font_01_sfnt_off00011e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5C 5316 bytes
SHA-256: 19054e570f1e8aae78756f5b2f9c93271f90f3d04d23e96bb9918c573b9da5e0
font_02_sfnt_off00013065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13065 15340 bytes
SHA-256: 482013e93d959eaef54ebee22b37fd2c4ed1bb5c654659975c8f291a28056714

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