Malicious PDF — malware analysis report

Static analysis result for SHA-256 805aabd9c26da902…

MALICIOUS

PDF

65.7 KB Created: 2020-12-16 16:09:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 34951a275127d704403a71d9777a435a SHA-1: 6ba5af6419d1f2a05f0aa34aeaefacfc7a8fe0e7 SHA-256: 805aabd9c26da902198ad3e250c6f6e305f24933df070149284a01407677700d
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

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://gettraff.ru/strik?utm_term=conquistando+las+naciones+para+cristo+dallas+tx In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380882/normal_5f97504c9add0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375339/normal_5fb5104245c3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377377/normal_5f95d2ff3f742.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413714/normal_5f9c68751025e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367286/normal_5f8d98fc3fc4d.pdfIn PDF document text
    • https://rigawegafo.weebly.com/uploads/1/3/4/5/134587157/4998949.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455179/normal_5fb9e666b370b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413475/normal_5f9ca43ce6942.pdfIn PDF document text
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/911415.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/5fc51a9dbe9b69395125fe2b/t/5fcad09fb495bd2028142051/1607127200221/repefilafovulidaguwof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b00e5cf3-f98d-490d-bb5d-8a05b49e4742/gowupizoniz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef24c21b-5110-4ee9-8b16-3e7a6f4d726c/98357768055.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cc6dc14dfd36fef0f123/t/5fc558f01972c46e3c501bd3/1606768883856/29108511588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeab7362-740a-4a2c-af6f-aaacfd769fd1/78583683878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cff645c-39df-479f-9b1f-84f9728c200f/82166831089.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC289 5168 bytes
SHA-256: 771fc41365f45166c164afdb96049649d71dd4a5382d12f6315fba84ee19ccb1
font_01_sfnt_off0000d427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD427 11720 bytes
SHA-256: 6ef8024fe9631ed8e08d8cf98ee7bc02f20b94c5c0e5e59f940340db60ba5af3

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