Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f6d9cb45099a434…

MALICIOUS

PDF

73.8 KB Created: 2020-11-25 04:19:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4f5d635bba5474ef9b135a5995479cf3 SHA-1: 9e12ee6ce1cad431346ad8cca0f81f5a21fcba13 SHA-256: 4f6d9cb45099a434ee879e0d04edb28f8c7383cef5a203335cc4745414243e1e
186 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 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=paladin+vs+cleric+baldur%2527s+gate PDF link annotation
    • https://mofivekirupu.weebly.com/uploads/1/3/2/7/132740685/gelekagawok-nawuzorire-tojoraluxibu.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/wogovanesofiz.pdfIn PDF document text
    • https://nazaxefuv.weebly.com/uploads/1/3/4/5/134589683/5286604.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377116/normal_5f979944dc0b6.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/verogufugiko_rujexelekox_tewapesezolegi_dilubolo.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/bilozosagadawetero.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483587/normal_5fbd9d7601332.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/a98d5905-4c3a-4572-b655-b86728e0b5e4/adobe_photoshop_cc_crack_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/844e15cd-d1b0-4bcb-ae7f-aa71cb59b7b1/john_macarthur_systematic_theology.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/mortal_kombat_karnage_unblocked_games_77.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7195a1f0-88a9-4d30-a979-c965940f7281/5839808983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b96c2d2a-431f-45ae-bdec-9f8956fd2e78/76157221823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/621bd72e-8e47-45a0-b230-9b80d3f75576/residents_of_ralphs_trailer_park.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E7 5116 bytes
SHA-256: 53683da18345beae0ebc04088f5b76406e113a4ae5afff4d722085d767ac41ec
font_01_sfnt_off0000e756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE756 10808 bytes
SHA-256: f4e83e8b170a1d668cc19b082af543af52279d32d18ec950108f367bfee8f8d7
font_02_sfnt_off00010c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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