Malicious PDF — malware analysis report

Static analysis result for SHA-256 d100b939e9015460…

MALICIOUS

PDF

82.1 KB Created: 2021-02-18 11:44:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9c17b0ecc50b0ef485f29077c055ae7e SHA-1: 9b576eb8d656bd7c10a03854e9d4cbb01489152a SHA-256: d100b939e90154603084d8df8070e1afcb48fb4da1f622a518a61920c1a6509b
156 Risk Score

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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=best+free+whiteboard+animation+software+for+pc PDF link annotation
    • http://vuxiparami.22web.org/djing_for_beginners_book.pdfIn PDF document text
    • https://sakiverore.weebly.com/uploads/1/3/6/0/136095660/89c59.pdfIn PDF document text
    • https://rovetizewi.weebly.com/uploads/1/3/0/7/130776299/polabixu.pdfIn PDF document text
    • https://nixozetite.weebly.com/uploads/1/3/0/8/130873825/fopuro.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/jdijhiX/nosanokureve.pdfIn PDF document text
    • https://luxaxila.weebly.com/uploads/1/3/0/8/130814132/6461ba.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/jaigghj/jivoluxagadonakogojunusa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/kilimurulavome.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/types_of_intermolecular_forces_worksheet_answers.pdfIn PDF document text
    • http://xuduzunubedi.rf.gd/ansys_hfss_training_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/95354223362.pdfIn PDF document text
    • http://detotoga.epizy.com/aashiq_banaya_aapne_movie_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/28096640045.pdfIn PDF document text
    • http://zuwogupewukefet.epizy.com/how_to_break_apart_graco_pack_n_play.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/muluginabetile.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/96986314699.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_off0000f5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E4 5432 bytes
SHA-256: 113053dfb351e87334fd28ba1594639937f70223fe4504b7938e0e5614c21056
font_01_sfnt_off00010830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10830 10848 bytes
SHA-256: 264acbfd03fb7f95b875e030588fe8bb69ff80cd293af07fbce551b70f8d9eb4
font_02_sfnt_off00012cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF3 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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