Malicious PDF — malware analysis report

Static analysis result for SHA-256 e054ecd2704558ea…

MALICIOUS

PDF

77.5 KB Created: 2020-11-23 07:02:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0eea8f9182ddd7a97e2ce3db0ae5b677 SHA-1: 20b389b2c4fe9665212581ca9e4e73c6103727c2 SHA-256: e054ecd2704558ea5b3cf5aa263a8c14e3bf7bf7c3232179a17cdd09cec0ac68
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://traffine.ru/aws?utm_term=afcon+2019+fixtures PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449776/normal_5fa32110c1b48.pdfIn PDF document text
    • https://kovumagamu.weebly.com/uploads/1/3/4/5/134578336/7983608.pdfIn PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/jomivedokugirulilum.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/xosabata.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_5f8a81fb1a88e.pdfIn PDF document text
    • https://vugawijop.weebly.com/uploads/1/3/4/5/134594760/wakij-nebibuwuw-semevufunumira.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/tetenifeme/suzixuponip.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/tuxufewamajavukes.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/37503143581.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/62118658775.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD704 5056 bytes
SHA-256: 72d81df89f62624ab1de077d90f19fcff3fbb9f1021cf5368b925f1d28a72c18
font_01_sfnt_off0000e840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE840 10260 bytes
SHA-256: bb9a6e35a55b2eb9e97729f0d63c110f9a6300043aeb69bf2fbef3724e39dde1
font_02_sfnt_off0000f741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF741 10572 bytes
SHA-256: 056822bb1406d00b2e96a6c20c713863f9900e17a17fdc0baff3a571004467f1
font_03_sfnt_off00011b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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