Malicious PDF — malware analysis report

Static analysis result for SHA-256 112a3a8750922f53…

MALICIOUS

PDF

68.6 KB Created: 2020-12-02 16:48:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 4e29a76ffd078ffc3bfb48153372ffd9 SHA-1: 168aa6e5e7a596f8603ef6e0ba3da1c382650325 SHA-256: 112a3a8750922f5384f0382a9049c6c9e5287c1827f1d4e78c4313530b199199
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded links suggests an attempt to direct users to external malicious sites, likely for phishing or to download further payloads.

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://cctraff.ru/aws?utm_term=cavernous+transformation+ct In PDF document text
    • https://vexepediv.weebly.com/uploads/1/3/4/6/134668456/gifab.pdfIn PDF document text
    • https://serofijukepaba.weebly.com/uploads/1/3/4/6/134693026/0bda8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427528/normal_5fade60d1f7a4.pdfIn PDF document text
    • https://titezexi.weebly.com/uploads/1/3/4/6/134639754/7383707.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/5fbe25824e98326c02d9611d/1606296967834/ict_systems_test_engineer.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3342111f6a4198494abb4/t/5fc3d4c04e98326c02868c47/1606669504370/email_elite_academy.net.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc185bea8793968640cb600/t/5fc4a5301972c46e3c30e189/1606722864493/comcast_manual_dns.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc141a05687f52b6b83892d/t/5fc3aaa03485235c8636f3be/1606658721251/72882659692.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d95c3398ff75154720e4/t/5fc78d724f9413233b24fbd4/1606913395515/tazegumobipuzaguxituwa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4a9c18e72e5fdbcdca9b/1606371997637/pubg_mobile_mod_apk_unlimited_uc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe319d3485235c868f8450/1606300062669/pathfinder_2e_class_list.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfc08f3de5e49b52a3ce9/1606286347730/75656398664.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_off0000d3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B1 4960 bytes
SHA-256: 1100c30038bf58cfa1445567699872cc97235628648a905a642df2314a11e961
font_01_sfnt_off0000e482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE482 9644 bytes
SHA-256: d9bee57469cc240c513f64bcbeaa813e828c9bbb691799b05d7b8d7ec8eccfeb

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