Malicious PDF — malware analysis report

Static analysis result for SHA-256 90b264d9b06c2edd…

MALICIOUS

PDF

62.0 KB Created: 2020-11-20 13:52:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 46dec173ec9d521e70ed9f5784990be1 SHA-1: ec78250bf8f2f80228e406ba1936530360bbad03 SHA-256: 90b264d9b06c2edd18e82b3ceeeaf7e3367ef4c371f6eaa77b6762ca85dec6c5
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 link that redirects to a known malicious domain, suggesting a phishing or redirection attempt. The document body, though partially corrupted, contains text related to a failed download, which is a common lure. The presence of numerous external PDF links, including one to a potentially malicious redirector, indicates a link farm designed to distribute malicious content or traffic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=san+andreas+download+failed+because+you+may In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f86f945b34f8.pdfIn PDF document text
    • https://tajekuludukomas.weebly.com/uploads/1/3/4/4/134498487/a9da0b27fc336.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/dazifozixawus/th5110d1006_manual_installation.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/71474355592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4004ce3-18ae-4b20-aafa-281ef334c31d/petsafe_rfa-67_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/aspen_hysys_v8._8_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/91463928546.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/anglo_saxon_riddles_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/965dff3e-397e-4c01-b2c7-d103208f5918/58773799156.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/oyshi_sushi_3_corpus_christi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a247cc2-732b-461e-81d2-cbd6e68641f2/3723865463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46176376-1052-4f74-bd04-382dad37f563/gabino_barreda_y_el_positivismo.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_off0000b41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB41D 5604 bytes
SHA-256: 2033e013f3fb05d819d2096fca16ee827a10f323199a807fcdf00746ab68ecae
font_01_sfnt_off0000c72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC72C 10504 bytes
SHA-256: ef2e3bc7162550d55042180c12e9acd8e0f9bd48eb5fa31d7823d4b9b3bcbdf9

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