Malicious PDF — malware analysis report

Static analysis result for SHA-256 20b5b6804d177ef3…

MALICIOUS

PDF

85.7 KB Created: 2020-12-25 22:35:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ead09c66968ac18245567bb3239bc2f4 SHA-1: 945bf8678dc08e426521fcfc3222cf831dc80ab7 SHA-256: 20b5b6804d177ef3850aed8557c258aed62d4c2312e680987f19614b73974446
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, suggesting it functions as a link farm for SEO manipulation or to distribute malicious content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the primary goal is to redirect users to potentially harmful websites.

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 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/aws?utm_term=bluetooth+game+controller+android+tablet PDF link annotation
    • https://cdn.sqhk.co/fejavegiwo/ieifjb7/spin_bubble_shooter_online_cash_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379379/normal_5f9e7a4bf1467.pdfIn PDF document text
    • https://kiwosetivugo.weebly.com/uploads/1/3/0/8/130874254/siwiwimiba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5fb3b7df1670c.pdfIn PDF document text
    • https://cdn.sqhk.co/gisanewat/uzjhjbQ/shader_mod_for_minecraft_pe_1._16.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jefazaxal/bajrangbali_ka_wallpaper_ing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aad89a59-f206-4fe4-b3dd-dcff8ab5a84d/89186128067.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/ethnography_and_ethnology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7105d006-2608-410f-be11-07123f59f77d/53422126397.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/xelemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd863577-56e7-47f4-a047-9047faf00d05/assassin_s_creed_odyssey_grave_discovery.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/minecraft_server_invisibility_command.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/54411502063.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001015a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015A 5248 bytes
SHA-256: a92f7aa9fc4f77e997859a0cb13686f8df7f4eb61f9b8fc8a2a49a7a68f9906e
font_01_sfnt_off00011306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11306 11336 bytes
SHA-256: 52a1d1f3b4ad046a946844da84f967f42604ec50ab52720d47c897480036421b
font_02_sfnt_off000139b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B0 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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