Malicious PDF — malware analysis report

Static analysis result for SHA-256 852f8f2022985f1a…

MALICIOUS

PDF

96.1 KB Created: 2021-01-04 22:10:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 57b7d3aa5ada1dcf5997667ce468d24f SHA-1: 8d175addf55faf314ad4a9aac210a057eb0372e1 SHA-256: 852f8f2022985f1afebebd25770c37cf6b1ec33092b1d66a7bd7042fe4392d41
214 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, and is flagged by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, contains references that suggest a lure related to "Wise tv fort wayne" and a link farm strategy. The presence of embedded URLs and the heuristic firings strongly indicate a phishing or malware distribution attempt.

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
  • 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://gettraff.ru/123?utm_term=wise+tv+fort+wayne In PDF document text
    • https://fulodovujigiw.weebly.com/uploads/1/3/4/0/134016909/febevonunim_kalivobex_fovotofuxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467325/normal_5faa3826badef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393369/normal_5fd0e5d61d22c.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/dLnTFgh/call_from_siren_head.pdfIn PDF document text
    • https://tusejefil.weebly.com/uploads/1/3/4/3/134320171/3d1326d0eded97.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/lonozote/college_student_curriculum_vitae_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afe3df1f-54fe-48b1-b93a-a734dd7f9b44/52613564466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26ea67b7-cefc-4709-8ab1-2af6c7daf259/36482952942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/735ff8d9-9773-4e61-963e-15802b50d505/xuxivile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5baaf55f-b913-4457-a504-3677c2122300/ravosaxoluvivenoluba.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/aadat_song_remix_mandeep.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/the_argonauts_maggie_nelson_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/046ccbc8-494a-4412-80f1-f9ebd8925db5/gopro_hero_3_black_edition_camera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a33badb-98b1-404a-bb09-58c098959567/gimozeru.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_off000136ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136BA 4996 bytes
SHA-256: 09d50cb50a1dc7031e63626a9a2d0e2d7c6ef5b3bccd0d62f0ba9e6596611b6a
font_01_sfnt_off000147e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147E9 13660 bytes
SHA-256: 823291539dc9fc90da2073be83231c25ff15d72004d3259abf7a0abf73cc4377

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