Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f4f0349ffc108ff…

MALICIOUS

PDF

73.9 KB Created: 2020-12-31 23:49:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3638069d3c41795360d292ec07639a41 SHA-1: e7589bfc4cfeacce252e872e97b445bb19d78cc0 SHA-256: 8f4f0349ffc108ff98d32001fa3fd6ff463ab27cd2f866ddb321afd55f1d9b88
156 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 heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The embedded URLs likely lead to phishing sites or malware downloads, as indicated by the 'Pdf.Phishing.Trojan' detection.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/strik?utm_term=general+hospital+spoilers+lulu+leaving PDF link annotation
    • https://cdn.sqhk.co/fetadupozo/ccWV3hd/vice_news_texas_oil_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/lewuravasu/XgcOySv/95803407175.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/labetiwageli-larum-lipabobuzife-xokosejizalotap.pdfIn PDF document text
    • https://kaledawuvilef.weebly.com/uploads/1/3/4/7/134727412/7133686.pdfIn PDF document text
    • https://cdn.sqhk.co/semegopo/dHgdgja/lesulifozunumupugobir.pdfIn PDF document text
    • https://cdn.sqhk.co/jobiwokojo/h6iasgE/satellite_images_of_earth_from_space_at_night.pdfIn PDF document text
    • https://xexonukomamub.weebly.com/uploads/1/3/4/3/134353621/e167c1310e6.pdfIn PDF document text
    • https://cdn.sqhk.co/kanedufopuma/VQfN6OF/181150872.pdfIn PDF document text
    • https://kodepifaz.weebly.com/uploads/1/3/4/7/134705681/e0be24b.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/fatikonavori/stbemu_for_apple_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/mercedes_a_class_2017_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a91bbbe-d10c-4435-91ab-60904664166d/10210418336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20b15769-f436-4021-a90f-5a5e4bc7618a/costume_ideas_2020_girl.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/jovixemosinifodagik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f7525ff-0e39-4312-af7b-8ec7a196e9f6/besepezixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d5b6b1a-98e9-44e3-9759-7f656092adc3/48369116854.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_off0000e6ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6ED 5172 bytes
SHA-256: a53474a8c76b49b97a3f4381130dd7225a5b710612bfdbd8ade8ddde1363020c
font_01_sfnt_off0000f88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88C 9872 bytes
SHA-256: cbfb33066f1b7a0a28ce77e807fb1cee16e2e3d0ed4db331fef78335e9dadad6

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