Malicious PDF — malware analysis report

Static analysis result for SHA-256 e63aaa6293a0ea22…

MALICIOUS

PDF

78.0 KB Created: 2021-01-06 09:55:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: d1452d04e038921ca2514a061ae9d2b6 SHA-1: 86251f8fcfd76a5b944e2a69d8cb646a46029236 SHA-256: e63aaa6293a0ea22c4a79108fc1ab012e1e51ea4f5f15062dd6a19c6194147c5
284 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains a link farm designed to redirect users to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The 'SE_CLICKFIX' heuristic suggests the document may also attempt to trick users into executing commands directly. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.
  • 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/wb?keyword=screen%20stream%20mirroring%20android%20to%20pc In PDF document text
    • https://static.s123-cdn-static.com/uploads/4458628/normal_5fc828b2889a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373526/normal_5fbee7b148f10.pdfIn PDF document text
    • https://sivamodinuna.weebly.com/uploads/1/3/4/7/134762665/9d1f274f6.pdfIn PDF document text
    • https://cdn.sqhk.co/zibusisujij/jeVjcEa/72977466073.pdfIn PDF document text
    • https://pawimugonuri.weebly.com/uploads/1/3/4/8/134882006/2697863.pdfIn PDF document text
    • https://jevokave.weebly.com/uploads/1/3/4/2/134266272/5499609.pdfIn PDF document text
    • https://fabuxitewuf.weebly.com/uploads/1/3/4/3/134349615/dunakumiluma.pdfIn PDF document text
    • https://repugonajipivup.weebly.com/uploads/1/3/0/8/130814926/liwijuporiniwowuriwa.pdfIn PDF document text
    • https://lataladegizozav.weebly.com/uploads/1/3/4/6/134685495/8887810.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/894360fa-46ef-4c8d-84d5-fdbe5bf93677/konokusobarogizuwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9793181f-cd98-46b7-adae-caeadd1aec21/degenoxobitesefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0067c4a5-331d-4a9b-a95c-f59f4d437c2c/tekmar_10k_sensor_resistance_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e3b1483-2595-4c93-8cef-bdeec3e4bd8b/dezodebopagad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4137da45-cba1-4271-b125-7fbec9665359/hobo_brawl_4.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_off0000eb61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB61 5464 bytes
SHA-256: 2e670ee2d785f98e55202927b459b36b02c892c854d77d6be084ab86809d1571
font_01_sfnt_off0000fde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE4 13140 bytes
SHA-256: 325d7d78d9990624d811f8bb6916035695d19d79a3337c6072762c58fd6e7d4d

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