Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d6e78483867d43…

MALICIOUS

PDF

42.7 KB Created: 2020-10-03 12:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e152c086a50aa76016f9f36808c5771a SHA-1: 934386ddf75370333ac90f4009962b9a8638509d SHA-256: 04d6e78483867d43b13f6aba54dd2802f6d4c4bfdee66b4143f2a4a6620d3568
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to manipulate search engine results. The presence of a password-protected archive lure suggests an attempt to bypass gateway security by encrypting a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://cctraff.ru/strik?keyword=eclipse+javascript+tutorial+pdf In PDF document text
    • https://site-1039481.mozfiles.com/files/1039481/91348535859.pdfIn PDF document text
    • https://site-1040000.mozfiles.com/files/1040000/72331542213.pdfIn PDF document text
    • https://site-1037061.mozfiles.com/files/1037061/16200350559.pdfIn PDF document text
    • http://files.lisarowlandsconsulting.com/uploads/1/3/0/7/130775331/c1c1aef1b.pdfIn PDF document text
    • http://xozekejop.tywi.org/uploads/1/3/0/7/130775172/jalewip-kuwomune-saxode-senatorel.pdfIn PDF document text
    • http://files.kerinmzr.com/uploads/1/3/1/4/131406344/lavemamumo.pdfIn PDF document text
    • http://files.ballycastletennisclub.com/uploads/1/3/1/6/131637108/2163712.pdfIn PDF document text
    • http://files.hellogorgeousre.com/uploads/1/3/1/1/131164152/8d73f54757d.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/527a923e-63b7-40ab-8044-37f6f3939587/2397486926.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9351/4645/files/dunirulinagejajanevuwiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8658/5764/files/tu_se_morta_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4019/7784/files/2006_kenworth_t600_wiring_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9703/4393/files/50351777528.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_off00005ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF5 5244 bytes
SHA-256: 09466073cd66aba21a6c17cf54c323ce56a9e3f37002e04cd283b47c7deebf60
font_01_sfnt_off000070ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70EE 14320 bytes
SHA-256: 2caa18e68ca0bb6848d9767c1ae120827d6cd4efae0fa318479fcba983984e92

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