Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb4c49a75d4c5dc…

MALICIOUS

PDF

64.3 KB Created: 2020-12-27 02:47:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7b6335482bb7af304056018c37f41927 SHA-1: f6180bc8307e081b13f0588c58c9b29e77f96285 SHA-256: 5cb4c49a75d4c5dc244817f7ebc7f4c44989e78f886c3814c5e299fdae39afac
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links, with a critical heuristic identifying it as a PDF SEO link farm. One prominent URL, 'https://traffking.ru/strik?utm_term=ship+tycoon+roblox', is directly associated with the malicious classification. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://traffking.ru/strik?utm_term=ship+tycoon+roblox PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5f9032eb687c6.pdfIn PDF document text
    • https://cdn.sqhk.co/merivexasug/SL29uk5/76104546001.pdfIn PDF document text
    • https://wamibujobaju.weebly.com/uploads/1/3/4/7/134716207/rosenugotegolap.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/e70e338e-f8dc-4ae4-ad60-c7c25e7cdbb1/pugogabuvexokumiwitinig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb78596b-08a7-42d0-a23f-4e16c9c5d462/comparing_slopes_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/samemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bb26796-3a23-4489-a0e6-13e9eb345607/black_and_decker_edge_hog.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/frecuencia_cardiaca_pediatria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5d7e331-f712-47cc-963c-322f36e04380/fbi_crime_classification_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/infographic_template_free_vector.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/letter_from_santa_template_uk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/zoxetamevaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b53bfefe-27d4-4d45-8345-088823b3135f/55688519556.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/heartbeat_heartbreak_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/14811422057.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_off0000bfe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE7 5048 bytes
SHA-256: 2c9a0f8003a9138d3a6f9630ad800526505a7e1b119a3149ad428ccf2c72d301
font_01_sfnt_off0000d11b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD11B 10332 bytes
SHA-256: fadea8d46a635c83d90d430b1c103e204e3ab9fa916e9a5fe14a46d3bc149411

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