Malicious PDF — malware analysis report

Static analysis result for SHA-256 27ebc546e4f8ac7d…

MALICIOUS

PDF

69.0 KB Created: 2020-12-15 21:39:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f2cfae30d5733b8c28ceb82778c3110b SHA-1: 9eda754ecc202a47de88564b9423ec8459fecdfc SHA-256: 27ebc546e4f8ac7df46bf066c9ae3b192cb1dd87c6d262c3e588691f49f4a282
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 critical heuristic firing for linking to known malicious redirector infrastructure, alongside a critical firing for a PDF link farm. The embedded URLs suggest an attempt to redirect users to potentially malicious content or for SEO manipulation. No scripts were extracted, but the PDF structure and link farm indicate a malicious intent to drive traffic to external sites.

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://traffmen.ru/123?utm_term=tableau+case+statement+with+multiple+conditions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5fb8d6e270a75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_5f87e71f4421e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369788/normal_5f890b89e1eda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450733/normal_5fbf671e3dd2b.pdfIn PDF document text
    • https://segawalapuk.weebly.com/uploads/1/3/4/9/134902876/4074873.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387408/normal_5fa02875f1b59.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/gurupixabogivaz/rajibojimorun.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/game_adventure_android_terbaik_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/23627056448.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/zuzazelajoraveweko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/805bb083-f230-4cf5-8d91-f887d30f3aaf/konam.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/scott_middle_school_yearbook_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd816fbe-5598-47a2-8d5e-17f9525fcc90/captain_michael_j_pierce.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/giwomokefudisuwapav.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_off0000d094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD094 5400 bytes
SHA-256: dfb625d155f8ae720cce8638f5339f5fa9c44148ae5aca867fdac72f5347e68b
font_01_sfnt_off0000e2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CF 10516 bytes
SHA-256: d83595c530420098092f16e90067c5165cf549f6527c4ed5b60f9e406db4d79f

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