Malicious PDF — malware analysis report

Static analysis result for SHA-256 b89d0a1bab0e525a…

MALICIOUS

PDF

86.0 KB Created: 2020-12-18 11:53:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 07b83402dbde79c10c6db5936a2b2578 SHA-1: 7189ee574b5a8ff7f11512f58abb320d4b7d12d3 SHA-256: b89d0a1bab0e525a5cba5e9308fcbe483bac8043187c5e025b00d1f05e7906f3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of a link farm suggests an attempt to distribute traffic or host malicious content, potentially leading to phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=natasha+shneider+alain+johannes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378410/normal_5fa0ed446ee58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464532/normal_5fb867670141d.pdfIn PDF document text
    • https://xogazusuguse.weebly.com/uploads/1/3/4/4/134479670/guxeloxibu.pdfIn PDF document text
    • https://porovepo.weebly.com/uploads/1/3/4/5/134527374/jobizotutuviwadu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446382/normal_5fa3dfdc8ce95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449990/normal_5fbd86970b00d.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://static1.squarespace.com/static/5fc5523bd26ff1194f913b76/t/5fce7b91ea287076b32cdff8/1607367570951/best_free_ringtones_for_iphone_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/luragatatepotegorepu.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/history_of_guru_nanak_dev_ji_in_punjabi.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/information_about_the_egyptian_god_thoth.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/powedevosisolaravekov.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/understand_your_man_tim_lahaye.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1cf72dd96f5918b6f25d/1606294776747/zonudowovikirekexajona.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcef8aef07fd00950dd52af/t/5fd129d56dcbf4153941b099/1607543257066/88523059523.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4bfbf403f5353fdae5828/t/5fc88a7a13f8d93bf207d59e/1606978170692/tj_maxx_near_me_now.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_off0001032f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032F 4744 bytes
SHA-256: e437732d89620633c02681b197dfd50f4bfbca0e5ca308da0c8ff3d5b91d810f
font_01_sfnt_off00011336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11336 13152 bytes
SHA-256: e43dba22539f10f1ffca088475b0a956c43e962bb845371cc7ce19aaf47a4690
font_02_sfnt_off00013cac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CAC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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