Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2bd21baaa5d72bd…

MALICIOUS

PDF

92.3 KB Created: 2020-11-10 19:24:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 04e5c34892779f37d5942c2ae933cf07 SHA-1: 2fd69afdca9411d9903d80f7ad6ae8a08291405f SHA-256: c2bd21baaa5d72bd78d225acf76368387335964eedfa08ac6b5927939e19e08f
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/123?keyword=d+d+5e+loxodon+barbarian PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381532/normal_5f9088fe891c1.pdfIn PDF document text
    • https://lobuponumabezi.weebly.com/uploads/1/3/4/5/134508668/joloropad.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/lakorixa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385014/normal_5f9384ae135da.pdfIn PDF document text
    • https://bilimetib.weebly.com/uploads/1/3/4/4/134435282/286231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421366/normal_5faab450ca126.pdfIn PDF document text
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/tujam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5f98ef4b7c28a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5f966830c83fc.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/juliziwojatige/st_lucie_county_property_appraisers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e00573e-a73b-4d7c-993d-f19d4d7274e7/tisojivadoti.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/meworezobif.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/38370135438.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/gizirelakufi.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/plastic_recycling_and_waste_management.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/makerere_university_fees_structure_2016_17.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/70609420308.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_off00012e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E0F 4972 bytes
SHA-256: 731ba432a9f78a359b194910798db498cef5a99def0218440332e426bcae6fd2
font_01_sfnt_off00013f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F0B 10940 bytes
SHA-256: 6b1b39acca882c142d2c72d73c324c15cd940020a4ea533403c0ae4d202f3953

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