Malicious PDF — malware analysis report

Static analysis result for SHA-256 01513b5f56c0ec82…

MALICIOUS

PDF

76.5 KB Created: 2021-03-02 14:20:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 174953b53e33a88c4a55c3dcabe60e5a SHA-1: 22d43a7526454eb852628b6a5d311ce4e8a00c02 SHA-256: 01513b5f56c0ec8268e804eb155455d5ef02f064eb0c3e334e83b0fbcedcbd4e
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://resalured.ru/123?utm_term=what+does+fl+mean+on+my+duralast+jump+starter PDF link annotation
    • http://vazawujuzu.sportsontheweb.net/what_is_health_economics_and_policy.pdfIn PDF document text
    • https://rigafimer.weebly.com/uploads/1/3/4/9/134901715/joxiba.pdfIn PDF document text
    • https://naxosetoj.weebly.com/uploads/1/3/0/7/130775404/muwuzemiguzupiwew.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/mazelidi.pdfIn PDF document text
    • http://nazevulilabume.66ghz.com/glencoe_7th_grade_math_workbook_answers.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/how_to_get_better_mpg_5.9_cummins.pdfIn PDF document text
    • https://varijiligedag.weebly.com/uploads/1/3/1/3/131383591/4ad2e906b09677.pdfIn PDF document text
    • https://vuminuzatadabem.weebly.com/uploads/1/3/4/3/134311796/3998091.pdfIn PDF document text
    • https://levonosaxedose.weebly.com/uploads/1/3/2/6/132695543/6291d20eb2e46.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/tesapibebujep/toxadide.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/tipos_de_aditivos_para_concreto.pdfIn PDF document text
    • http://jujobope.atwebpages.com/58834944199.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/sapna_chaudhary_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/how_to_hard_reset_an_alcatel_one_touch_evolve_2.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_off0000ece0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE0 5472 bytes
SHA-256: 906d10e21a6f0193f49217a57ddaccf827ea9dc43e7d0fcf9c6d4090a43267f5
font_01_sfnt_off0000ff6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6D 10828 bytes
SHA-256: 6a45b16805d0065b7273e27339ada9f8245cdcbd44a44f66538ac769952a2e68

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