Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1c6c5505918772e…

MALICIOUS

PDF

76.4 KB Created: 2021-01-03 00:20:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9b663ef207f9e5db38b94df50c73e8e1 SHA-1: ea1fe4d9c6ec4a4df2d10668c6b683337bab73de SHA-256: f1c6c5505918772ef404d2da87ea375cbf1b583b1e477ab5678c3238d683a698
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains numerous embedded links designed to redirect users to external websites, a technique commonly used for phishing or distributing further malware. The presence of a malicious redirector link and a large link farm indicates a coordinated effort to lure victims. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest an exploitation attempt, likely leading to a second-stage download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=osprey+stratos+34+vs+36 In PDF document text
    • https://cdn.sqhk.co/sofetarunox/yQ5ijjd/78412319664.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxozowaki/jfJwxjh/44815486824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383475/normal_5fd396780a1d9.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/IhjhEhh/download_panzer_war_complete.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448720/normal_5fbc02f5aeca2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417643/normal_5feb24cd79f9b.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/gjdFiaj/gramfree_app_download_for_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475853/normal_5fe7f25b5f642.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450504/normal_5fdc3fbba5e8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484624/normal_5fb6d96ba6487.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370073/normal_5f8850f1eeaa8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478932/normal_5fc3eb0f6fd49.pdfIn PDF document text
    • https://ramokazadi.weebly.com/uploads/1/3/4/4/134470245/7851276.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lawakux/rawazasutovokifiwa.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/15773036851.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD675 2940 bytes
SHA-256: 72b815926571ed76dcdb15ba0f925f8be737f518649be50e3ea36e0fc125b231
font_01_sfnt_off0000e101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE101 5008 bytes
SHA-256: 7f001413987045921530ac8da908fdb8a2c000217e70c05f3b23d71103038760
font_02_sfnt_off0000f224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF224 10608 bytes
SHA-256: 4e157257142730db163d85021a6aa1c6d691562212867d51e12fa2e7b3846eb5
font_03_sfnt_off00011672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11672 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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