Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dde748a06cea143…

MALICIOUS

PDF

68.9 KB Created: 2020-12-15 22:50:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e614ef515b814babd7039719e7d98139 SHA-1: 976b1a25e360daa74f6f8fa805c782a69857d38d SHA-256: 8dde748a06cea143187b7b8ab1e5b9c733d0b36ebaa900b9fdcf3a1429bb23c2
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 0.9998

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://trafftec.ru/strik?utm_term=the+complete+book+of+bonsai+pdf PDF link annotation
    • https://ziwugedaxuz.weebly.com/uploads/1/3/4/5/134501511/xakezixaz-tusobudoji-kizazanune.pdfIn PDF document text
    • https://zunuduzeguw.weebly.com/uploads/1/3/4/3/134344012/56af2ebd1d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425913/normal_5fa9ff100a3bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371020/normal_5fc2c80111a0d.pdfIn PDF document text
    • https://mesirurot.weebly.com/uploads/1/3/4/7/134706751/jijedudaxegigesiwoze.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/a621efdd-3a05-4008-bb04-f890583fdd3b/megaman_x_axl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/185d0456-fa9b-4bc0-9be7-696286c691b2/manual_paddy_planting_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40ec892b-e789-4e34-94f2-73b61d2067c3/peggle_blast_mod_apk_2.23.0.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b75f8b9e860b7b22cb6b/t/5fcd5a195177ea328cd3716d/1607293466829/88954712157.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/alan_walker_lily_flac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cce2edee-80b3-47bf-be51-eb7fc2f972d3/19712011433.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/graphic_design_tutorials_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/85028178384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1499f2ff-ed70-4954-908f-52b2fa2f3491/sonoma_county_property_tax_covid.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/19116433280.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/xibomudimajevoratamatu.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://scripts.sil.orgIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC208 5452 bytes
SHA-256: e5407c77216103c000e1358e0e1f58da19968f6126eb90b2dc19ce07ee71bf45
font_01_sfnt_off0000d467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD467 10592 bytes
SHA-256: 78e14b1bd7f4b77a948b4ee1892c5817013d223f67d105303a042af9865baf4c
font_02_sfnt_off0000f885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF885 4324 bytes
SHA-256: b87d03b8b92640ff53ea01d2732c721528b725048c1ad0e2e384714276bf80b5

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