Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dceb5d83120e945…

MALICIOUS

PDF

66.3 KB Created: 2020-12-16 18:44:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c2f927b8b7cf9a486db0a9289dd6cc96 SHA-1: dc00cae79678346be7d4462c663acc18cd978bdc SHA-256: 3dceb5d83120e9450367636fe0adcb4c64a0392a9031b41bb5ac147e8be154dd
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://trafffe.ru/strik?utm_term=born+mens+shoes+louis PDF link annotation
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/3d21f99.pdfIn PDF document text
    • https://povewagefafede.weebly.com/uploads/1/3/4/8/134888055/d4d57b5f62.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://uploads.strikinglycdn.com/files/6fe3fb85-46cc-459f-a3dd-daae5e915442/24715220642.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/makeda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85c04e30-452f-4246-b7b1-b17f0cec755b/granite_run_mall.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/narrative_career_counseling_activities.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e7d97c4-d837-466e-8c90-6e88f6e4c722/everyones_an_author_2nd_edition_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/lofepejikovapanitalanil.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/milford_nh_dmv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d6e7ed6-9a3d-4a9e-be65-58d8e77c19b9/9925295933.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/eventuali_informazioni_traduzione_in_inglese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebb03135-9cbb-4820-b7f2-f34bcd835442/52865868060.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/81148434238.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/honeywell_international_inc_annual_report_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/vavupelimuturepifusuboji.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/sas_enterprise_guide_7.15_hotfix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d3713dd-4d4f-46c8-9444-89b3100912a0/introductory_chemistry_6th_edition_cracolice.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8A0 4564 bytes
SHA-256: 6426a08f7bf2cf9ca9a1323d9182df2e1dd8b6065a747a2a1b38196db3b3830c
font_01_sfnt_off0000c7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7DA 11476 bytes
SHA-256: 5fa6851f126c96e6fff874d092071603683aa7ccef340e9c6740ce163657bc6b
font_02_sfnt_off0000ee45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE45 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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