Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8a02a7e65e48f62…

MALICIOUS

PDF

73.8 KB Created: 2020-12-21 23:22:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c06b9edf15491b21b56bb8269efb4f5b SHA-1: d314f92921ac951574cb2b2afab6bcc9cd2a0621 SHA-256: e8a02a7e65e48f62b043dbd1e419401855544eb3e79693f074583bd12c444933
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics, including a malicious redirector link and a PDF link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV also strongly indicate maliciousness. The embedded URLs suggest an attempt to direct users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=gem+hunter+tv+show
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/09be98978.pdf
    • https://xefozevinunakab.weebly.com/uploads/1/3/4/3/134340699/rejogapoxefud_vumobat_jegutokowunonor.pdf
    • https://piborubaladedos.weebly.com/uploads/1/3/4/7/134764427/8481336.pdf
    • https://ferateritilew.weebly.com/uploads/1/3/4/2/134265971/6899435.pdf
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/bugan_mekaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static1.squarespace.com/static/5fc144361c8c7413143450ce/t/5fc2c3c1f81c9a2a0cfd7082/1606599621221/female_wolf_names_generator.pdf
    • https://uploads.strikinglycdn.com/files/0aabb91e-b669-4de3-b5e4-391279bd929b/72013343183.pdf
    • https://static1.squarespace.com/static/5fc0ebbe5687f52b6b814126/t/5fc894d04b97230d0510aa27/1606980817170/bazogegemurowozesevesuzoz.pdf
    • https://uploads.strikinglycdn.com/files/43eb8928-1ad6-4ba1-82b3-d2738540c986/xuwimurodozu.pdf
    • https://uploads.strikinglycdn.com/files/3cec0c1d-584e-4ce5-87e3-29572040b2d0/lowes_charitable_and_educational_foundation_grants.pdf
    • https://uploads.strikinglycdn.com/files/b0a27124-6c5a-4b6f-8b2f-6e5b5b274153/46137068193.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d86f.bin
89e5b1f52910a6a2125470d939577c0f8f9f19059149f9a6a84da8ad2b9ca6be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD86F 4700 bytes
font_01_sfnt_off0000e858.bin
04418bee630cbd93a3e4fe468c100b95c8e93fe1f98e4ff26124deea89f36c52		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE858 10112 bytes
font_02_sfnt_off00010b01.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B01 4324 bytes

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