Malicious PDF — malware analysis report

Static analysis result for SHA-256 4985a547d5629056…

MALICIOUS

PDF

93.8 KB Created: 2020-11-25 04:01:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 42e1f2d0624d673715ab09e92f253284 SHA-1: 2217c10c1626b74c7cc963810687092088f09a77 SHA-256: 4985a547d56290563d184ba232f0ec9680bd6c67677d8848f92551e6184fa57a
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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=luxury+shower+curtains+john+lewis In PDF document text
    • https://cdn-cms.f-static.net/uploads/4486983/normal_5fab3582eb6e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460950/normal_5fbc133f3db5c.pdfIn PDF document text
    • https://naligunuded.weebly.com/uploads/1/3/4/4/134472871/4630591.pdfIn PDF document text
    • https://ninadagonalot.weebly.com/uploads/1/3/4/6/134668818/lamux_jededawilen.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/tokit/ligarumu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4987ec95-f597-4783-ac2c-f933853bbc99/wipezevuwedotofile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73d5352a-52be-4989-a336-9815fcda25c7/sinawunirorupufatomasim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e18c7b0-5a47-45dc-9963-d4ffaf70aac4/math_kangaroo_usa_questions_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/168836de-e1ac-45d7-8b23-8f9ef5125624/49425730968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a965fc9-3020-4482-9a93-132de8e84407/round_robin_backup_strategy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a6bff91-07c9-40e7-8c08-9d6f94668fa0/vurefomologibiromewojota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22103f9a-00f8-4997-8a28-88a5507df936/65189463961.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acaf43a3-0414-41dd-8a9f-2200db563485/bitopubafipijavazamimurom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52be185e-d5ed-4bc5-b6d5-f9582b8b83ed/14857611023.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f680a2ec-0ecc-414a-b2a5-beca6573a070/figagoba.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BC 23904 bytes
SHA-256: 668d96e350f3168d62343fe28458e43313b106b8f1b4a5b3fdaa3260b38a35d8
font_01_sfnt_off00011c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C87 5168 bytes
SHA-256: 591673f708cc21eee02522b8a690d7f1a19b19fb30d34267690b05b3163d7608
font_02_sfnt_off00012e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E3C 10408 bytes
SHA-256: 872835ea5be33c8da9f6b4a9edd0bd1b265d52cd5ee2d7e10101c417da3a9790
font_03_sfnt_off0001522f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1522F 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073

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