Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d1ece3feaa80cc…

MALICIOUS

PDF

70.8 KB Created: 2020-11-13 23:24:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: db574b07223686c52764ddc21e48e6be SHA-1: 24ce83512c1e0bcef70016cfb1aca9de8a704bf6 SHA-256: e0d1ece3feaa80cc5c9ec79a42ac1b3a3b46a7e6728a4f85f00f97c1e38d4604
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 0.9997

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://traffnew.ru/123?utm_term=introduction+to+trigonometry+worksheet+1 PDF link annotation
    • https://roromitekavu.weebly.com/uploads/1/3/4/5/134528712/fisanevizuradipovux.pdfIn PDF document text
    • https://xanugobolenaz.weebly.com/uploads/1/3/4/3/134371028/af1204bb.pdfIn PDF document text
    • https://gatilavim.weebly.com/uploads/1/3/4/3/134391542/fe0689ee80a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451575/normal_5faa63e546c31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f96a0b02e932.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f99645194536.pdfIn PDF document text
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/woledapo.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/48470d5c-f806-4c27-9517-5a452a4457ea/tic_tac_toe_c_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfe02e32-91e6-4833-8fb6-49ab1ddb9a77/donde_termina_el_arcoiris_frases.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/258996f4-fedc-458c-823e-9dec1913520e/32353460018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55e95656-40af-4725-8ca1-2a1e128616e2/26987180612.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_off0000c8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A4 5240 bytes
SHA-256: 45281a92a4b31d936e721a4fa2e37d022f75981c88f52f8226585c6f38f8414c
font_01_sfnt_off0000da68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA68 11228 bytes
SHA-256: 45794e40278577f1939f7d46e18813c1b9d380e694ed3db8022af76982337362
font_02_sfnt_off000100a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A9 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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