Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b210286eb54b342…

MALICIOUS

PDF

69.2 KB Created: 2020-12-17 10:24:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2e440954707bfc1cad20f25718f2caed SHA-1: 757caa2405f8a6a3b33cd6357e63aef38de289df SHA-256: 2b210286eb54b342d79f7c30f571da94ec22c0eee853e5d088200e0b12d7b5fa
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, potentially leveraging JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cctraff.ru/123?utm_term=fisher+price+mobile+replacement+parts In PDF document text
    • https://karojigulad.weebly.com/uploads/1/3/4/6/134623473/jejor-nawom-pogakokabig.pdfIn PDF document text
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/gilozelozojalasafufa.pdfIn PDF document text
    • https://zorivaleguzovul.weebly.com/uploads/1/3/4/5/134596353/tegir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf49009ee0f32b8749bdaa/1606371585563/proyecto_de_vida_personal_ejemplo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1576327a199023ab86c6c/t/5fc782860623334b0c629ca5/1606910599586/draw_clash_one_man_army_3d_models.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/30629506382.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0012c12facd59cea80d2a/t/5fc2ba26fa04221c71798800/1606597159583/61564777372.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c2059698b02c7f395ada/t/5fcdc15d3ff1011540114577/1607319908141/52494841562.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3805b3dfdd95b60e588d7/t/5fd1cba2b0f0f842d7a6e452/1607584676435/norofulasufumajilenibasi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfb2c3570fb44d1c90f9e/1606286124735/best_buy_upright_freezer_open_box.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4cad3570fb44d1f90f9b/1606372526057/shark_navigator_lift_away_manual_nv351.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_off0000cfd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD7 5268 bytes
SHA-256: 980d9b6f646d20e5b76a0237d8f021046200d42116cb5ffd3b1d3c058a2bcd00
font_01_sfnt_off0000e194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE194 10836 bytes
SHA-256: 127a3fb8a9d3daf90327f08847df7281824227006497cdc81e91d284381157a8

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