Malicious PDF — malware analysis report

Static analysis result for SHA-256 89ae673ac5aee1cf…

MALICIOUS

PDF

58.2 KB Created: 2020-12-19 22:01:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ea7b97e71e5ff715f1b3905f31282403 SHA-1: 9f66156539c959f41691b4f47f69e8a73a7b21b7 SHA-256: 89ae673ac5aee1cfde5e9af05a9030d7909371b058814fb00a9c9bfa07309cef
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the presence of a malicious URL and the overall detection profile suggest an attempt to trick users into visiting a harmful site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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.
  • 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/aws?utm_term=infinite+warfare+trophy+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417145/normal_5f95daf515dd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459468/normal_5fa1a1e190e1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386606/normal_5fb2b93a606dc.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/likanutavorolebonat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412763/normal_5fae780247b15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377109/normal_5f92d85f63199.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/5fdd28e788390d34f381f39e/t/5fdd5d617f4e6a33670a0a05/1608342882532/91653326914.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26d6f8fb-9a5e-4ef2-8937-fa25525774a7/61726015168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a1dec42-47bd-4d09-ab60-9fc1327249c9/animated_infographic_powerpoint_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/avis_sur_centre_de_formation_europen.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fceceab6e950304d77bf563/t/5fd17793b91f50015ee3aac9/1607563156669/11111199545.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_off0000ac74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC74 5224 bytes
SHA-256: 4357d7832d229b1095f4588a2fd9a2d8382cec763556812a953916c8f0629db4
font_01_sfnt_off0000be52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE52 8620 bytes
SHA-256: 4d7a016a3f30345b42d798edb787cd1c3951314954f344ec0e3c02cc78b9cba7

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