Malicious PDF — malware analysis report

Static analysis result for SHA-256 61567cfcae869ed8…

MALICIOUS

PDF

66.8 KB Created: 2021-01-06 23:49:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: d157035cd9a8ad2283f38eb432dbb56f SHA-1: 3b9c2a075909fcd5f45c0fff614646e9ff311d79 SHA-256: 61567cfcae869ed8042cb3096a4a53d85cefa0825c1ae045ac7769ed2456c11a
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with at least one identified as a malicious redirector. The presence of a link farm suggests an attempt to manipulate search engine results or distribute traffic to malicious sites. ClamAV detection and ML classification further support its malicious nature, indicating it is likely a phishing or malware distribution document.

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://ggtraff.ru/123?utm_term=live+oak+elementary+watson In PDF document text
    • https://cdn-cms.f-static.net/uploads/4406501/normal_5f982abd8334c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378406/normal_5fb80d7173e83.pdfIn PDF document text
    • https://xigodawi.weebly.com/uploads/1/3/4/4/134464905/efd828de0c00ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_5fc29b5201c8e.pdfIn PDF document text
    • https://genifefesabido.weebly.com/uploads/1/3/3/9/133999330/lopar-pixumipumivip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xajowu/fekajogesizakimokatak.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/1370830635.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/songs_of_dance_video.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/66379196983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52cda135-658d-4069-8ad5-af05f8c8c5bd/fefudolewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e6e3014-73ba-4142-b214-3cb6f0f9b51d/67496246738.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/vuxapi.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_off0000c975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC975 5088 bytes
SHA-256: 7803425f2558426de4af5aac0f7254b0fa90e1413e02cb8965b5471d9639c311
font_01_sfnt_off0000dad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD2 10416 bytes
SHA-256: a94e7cdedb52a8bf01e0df77ad99f93dd8c967118196b0b003e67027ffeff488

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