Malicious PDF — malware analysis report

Static analysis result for SHA-256 4054095f497befd2…

MALICIOUS

PDF

41.3 KB Created: 2020-11-03 17:36:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 8c045a9755b9c0ebe43e61eb23b8c03d SHA-1: ddd60ec84af6ba8bb1247756e6f142f63912da24 SHA-256: 4054095f497befd252791ba1fe05cbf905ccc7391410bacaa2b9a90828d42c64
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://cctraff.ru/123?keyword=nfl+reddit+buffstreams+eagles+bears In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f97c2446f24b.pdfIn PDF document text
    • https://suwagapijewes.weebly.com/uploads/1/3/2/6/132682436/459212f10f41.pdfIn PDF document text
    • https://gemenudotipetal.weebly.com/uploads/1/3/2/6/132695720/vetetikosotuzafiwop.pdfIn PDF document text
    • https://kugakisan.weebly.com/uploads/1/3/4/3/134390280/dabononekuxupex_dojol_wutunoben_rulapapazotam.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/9509331.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/suxiweke/lesusetute.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/memes_clean_for_kids.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/posugi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c1ab84f-81fe-4d8a-93e9-6820c5181c6d/56337016353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a4d468a-baa7-445b-b9ae-7829f1e081be/osrs_bronze_dragon_killing_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9564b511-41b9-4774-856f-9afb48a00112/what_role_does_denitrification_play_in_the_nitrogen_cycle.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_off00006222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6222 5336 bytes
SHA-256: b2a57a962dbe681e6d9c67dd43565c3b414326a44dd452e5abb73ebe35c7dc00
font_01_sfnt_off00007433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7433 10760 bytes
SHA-256: 23e0226584b204e3603975671962ecbd5353ee2f1db3e2efa206b5fbf0568f5c