Malicious PDF — malware analysis report

Static analysis result for SHA-256 94345312e386a106…

MALICIOUS

PDF

63.0 KB Created: 2020-12-20 19:04:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8cbeb0ef80032a578b4806beb97ed324 SHA-1: 4d43dc2f28b6dbe3825970c3f18c2a5ca7e71cf0 SHA-256: 94345312e386a1061e5704ea2387f2623d54ea5f09b04bac8ebf785b3a8f3ca7
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 to known malicious infrastructure and a link farm indicative of SEO manipulation. The embedded URLs suggest an attempt to redirect users to potentially harmful sites, possibly for phishing or malware distribution. While no scripts were explicitly extracted, the nature of the embedded links and the ClamAV detection point towards a malicious intent to compromise users through external resources.

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/strik?utm_term=spectrum+remote+code+for+onn+tv In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414867/normal_5fbd323e49342.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485172/normal_5fba8a7028f87.pdfIn PDF document text
    • https://rogejizerabori.weebly.com/uploads/1/3/4/7/134763318/koxedexemefuw-zaxami-getufojidosu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369317/normal_5fde2849554de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376362/normal_5f91cc9b56bb5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403681/normal_5fc93c8fe738b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389074/normal_5f8f6400cff4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486034/normal_5fb29b8341e5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409092/normal_5fa78b02a473a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530937/normal_5fcd8ea6a2e5b.pdfIn PDF document text
    • https://gifedoku.weebly.com/uploads/1/3/4/2/134234788/1023183.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427506/normal_5fda7f321311e.pdfIn PDF document text
    • https://pikotawikeju.weebly.com/uploads/1/3/4/4/134496208/jerarirasape.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/5fdc7b6f43483e57e2cf12c2/t/5fdd2382456d1f3a760f7396/1608328066373/93245871303.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_off0000bd03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD03 5044 bytes
SHA-256: 47ab71f4713153391b7369f9a396d25c6cfc032d935191ba2508c113a76a1fbb
font_01_sfnt_off0000ce24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE24 9712 bytes
SHA-256: cfff22e2c22bf01b724642a33201d54b607961f7e1e00890318e1800aa59749a

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