Malicious PDF — malware analysis report

Static analysis result for SHA-256 e05fd2913250cf28…

MALICIOUS

PDF

77.8 KB Created: 2020-12-25 18:27:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 5a38b5f8a8ff351b7e40c1f3581df56f SHA-1: d2b4f4915fc3eab822e0b2fb1cfdda093185b0b8 SHA-256: e05fd2913250cf28a3174c83f82350670015a3fc21888aa0a4e39e4503eb61ce
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a redirector link and a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', suggesting it was generated by a tool rather than being a legitimate document. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=jimu+robot+unicorn+review In PDF document text
    • https://static.s123-cdn-static.com/uploads/4493597/normal_5fde82ee546b9.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/9729591.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466146/normal_5fb6e49c8015d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385863/normal_5f8fa048b713e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403415/normal_5f94d9627d311.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f871bf4aae16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371536/normal_5fe52c6660064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388819/normal_5f8e9a2fe3f41.pdfIn PDF document text
    • https://zorivaleguzovul.weebly.com/uploads/1/3/4/5/134596353/xurasalixururunig.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/vunaxezotajejezi.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/varolexexus/space_truss_structure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f06579ac-b2ad-46d9-b96b-c1620b8204c1/gajamovaregovarejubipajol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/135db507-c0a8-4730-b208-4f85693d4a50/99159835370.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/29729375449.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE714 4688 bytes
SHA-256: d85aff85c6e014f0f0e77808b3e952926d5fd3362706758c9c2b5376303faf67
font_01_sfnt_off0000f6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F9 10916 bytes
SHA-256: e5aa91295a476fbb0687e74e7d8164939b15567129feea170a0929b0224d127d
font_02_sfnt_off00011c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C35 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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