Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0770c6872e5e7e1…

MALICIOUS

PDF

69.8 KB Created: 2020-12-17 19:08:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0bf19951dddd772f0b5be5d82ad216d8 SHA-1: 9c4320f33d0189b60823544c35b991eb8a4c8ea9 SHA-256: b0770c6872e5e7e17ad5a344506536e31adceaee4109801a16ff170b4eacfde1
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded URLs suggest an attempt to direct users to potentially harmful websites, possibly for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious intent, likely related to initial access via spearphishing.

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=skechers+tone+ups+flip+flops In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413590/normal_5fa7ab2bcfb0d.pdfIn PDF document text
    • https://zipibolusoxa.weebly.com/uploads/1/3/4/6/134627603/0aef499391d2f.pdfIn PDF document text
    • https://regumalewa.weebly.com/uploads/1/3/4/6/134694163/gudoreximesif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f8b5cc2712a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470226/normal_5fc6b5c549249.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477379/normal_5fbc8ad31d761.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466675/normal_5fc8fe6617811.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375896/normal_5f909cb124bef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446401/normal_5fbe63ed2e5f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402711/normal_5fafeece7dbb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423154/normal_5fc33abb056a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445320/normal_5fbc17356ee23.pdfIn PDF document text
    • https://jomitapekox.weebly.com/uploads/1/3/4/3/134319499/jotumutotubivef.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
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC829 4940 bytes
SHA-256: 6b06a17ce73d22ee69bc64ce7cadbb344eb95ce1c047e65a1423ab8a834096b0
font_01_sfnt_off0000d8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E4 10476 bytes
SHA-256: 933ba75ec93d0bea706166c95ee3dff0f5d5e71ac269ca461faa709ffa91594c
font_02_sfnt_off0000fc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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