Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3dc0438e282b846…

MALICIOUS

PDF

67.1 KB Created: 2020-12-21 05:43:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: a7f424ce9ac26a26869d0ad17605a925 SHA-1: d8c887853a83633862c6ff1ec8b53f682cd1a3ce SHA-256: f3dc0438e282b8467cb18a2fdcc254630582bbca4f5f705c2ac6d656b264829e
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. This suggests the document is designed to phish users or lead them to malicious content. The ClamAV detection and ML classifier further support its malicious nature.

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
  • 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://traffmen.ru/123?utm_term=west+egg+vs+east+egg+differences In PDF document text
    • https://koturukumofup.weebly.com/uploads/1/3/4/8/134883222/burusibubojibemo.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/6327393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478933/normal_5fb6af7659686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369640/normal_5fa954a0607aa.pdfIn PDF document text
    • https://lewelekokoje.weebly.com/uploads/1/3/4/3/134333059/2162700.pdfIn PDF document text
    • https://zemabata.weebly.com/uploads/1/3/4/6/134677216/fobubole-tixetesus-sowefew-deridovim.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/5fc6d63eb2e29c7ba9901a48/t/5fca620c59975d40e97a6f17/1607098904561/the_short_second_life_of_bree_tanner_plot.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fded181546cca2c41591fb2/t/5fdfa306463d3b6c6f4fe206/1608491782884/burj_khalifa_construction_video_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12a1c9698b02c7f224c6f/t/5fc53a6c61e25426e1e1d130/1606761070609/62610325732.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/javascript_tutorial_book.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f319ab79f442f229e2d8/t/5fcca142cded405bb8d3cec8/1607246148026/healthy_sugar_free_cake_recipes_uk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfc5bdae50a014587507a/1606220892097/ap_human_geography_2002_frq_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc364f7104edf1d7790e178/t/5fd00f5c349c9408591a610e/1607470941269/16113531586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f87ee18-91bb-4442-a983-ef416bc91d40/22439796518.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_off0000cbbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBBB 5232 bytes
SHA-256: 95cfec5449028a4a1f6995d2dc88ecd076d464224ff1f08875b8feddfe3c1ec7
font_01_sfnt_off0000ddae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAE 9756 bytes
SHA-256: 83c8fc22c94fd9911f51a3c093a741466e31e9af84104b5640eab37e539a6622

Open this report in the interactive analyzer, or submit your own file for analysis.