Malicious PDF — malware analysis report

Static analysis result for SHA-256 52cbeaedace724ee…

MALICIOUS

PDF

84.6 KB Created: 2021-03-19 08:10:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ee8920495a975c423d6b3bff633f0d9f SHA-1: 97e42851d8a941c8a299fbd9d0963a2e85037a30 SHA-256: 52cbeaedace724ee8182a018183c61cebbfb0e87a7cc28113ff5b76475d381a5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/123?utm_term=aditya+hrudayam+in+telugu+pdf+free PDF link annotation
    • http://buytoday.cc/full_hd_1080p_video_converter_freevgfa7.pdfIn PDF document text
    • http://smartline58.ru/74717703495hauqp.pdfIn PDF document text
    • http://unlockdeals.shop/59772838266xz5bs.pdfIn PDF document text
    • http://ketrovk.xyz/47178502652w9nin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_600b3c09f0a3e.pdfIn PDF document text
    • http://izzzaaa.space/88867649576uya2z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392457/normal_5fe7d4ca17545.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/15693438133l5wk9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1cc94e4-f48c-4158-a2a6-6729ca898585/74802614934.pdfIn PDF document text
    • https://49b821e7-ee7e-41b4-809b-d0417b8c1ddf.filesusr.com/ugd/927743_e1d456b83e1f4bee822c536e0a4690ff.pdf?index=trueIn PDF document text
    • https://c8f6a2ed-bc8a-4fd4-b26a-19707db7c4cd.filesusr.com/ugd/1cc7e8_921ecec7bd504f4bb9bb2b42a6adb671.pdf?index=trueIn PDF document text
    • http://revupeponalewuj.epizy.com/xixigaxudaxabag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3487991-448e-4e0c-b43b-a8d378cb1838/33836708188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de1ddc3d-fb1a-4ae0-b767-cd2f7011cca0/how_to_market_a_life_coaching_services.pdfIn PDF document text
    • https://989244f3-426d-4557-b4f1-0018dac9047c.filesusr.com/ugd/57c819_e2fb734ee797464eb15120f0c85e0d20.pdf?index=trueIn PDF document text
    • http://besasasef.rf.gd/winterspring_frostsaber_guide_3._3._5.pdfIn PDF document text
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_728e3f4612674ac8b6c6a1d2b7e28a5d.pdf?index=trueIn PDF document text
    • http://lulawutereb.rf.gd/zofefiwosufidux.pdfIn PDF document text
    • http://katewamopexo.rf.gd/absceso_perianal_antibiotico.pdfIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_2fa77610274649dea4882598c80c22da.pdf?index=trueIn PDF document text
    • http://tavaxovowewut.rf.gd/58322951808.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_off00010e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E97 5368 bytes
SHA-256: d4825c1f70a6b58beb8ea4d317027bcbe529e76eac46fb71cc429d63789cfb23
font_01_sfnt_off000120bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BD 10948 bytes
SHA-256: b813a714188aa2d0afa180bafacbf58ffe704281729b547323a4db4a8778024f

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