Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ea58a386820c638…

MALICIOUS

PDF

65.6 KB Created: 2020-11-17 06:57:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8917f8d0d6774b0b537cd6ad5df98502 SHA-1: d494d906ea34cf4c88b9e362e58600a6a9246e89 SHA-256: 9ea58a386820c638a7682bb7a4b92dadae108cc1e7dedf9b3be797d61313a042
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=ars+magica+2+bosses PDF link annotation
    • https://pegejapadeju.weebly.com/uploads/1/3/4/3/134355249/toradowadapuxajiv.pdfIn PDF document text
    • https://xizodekez.weebly.com/uploads/1/3/4/7/134769153/dovaviz-bizuxador.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/16069538-dfcf-4b70-a7ea-b5e62412d0f7/automatismos_elctricos_con_contactores_documento.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc55f4b0-d091-4ade-9c70-e0c1babdcf12/contas_abandonadas_transformice_2013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17581b0b-b112-46c1-972f-23816d87ad97/85981459624.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/hozier_take_me_to_church_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43e5576b-d237-4879-b1b0-4a3373073dcd/xasusiruxivozofimugor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33f89bc0-59f1-4814-a955-75d74a41316a/yoshi_garden_earrape.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/rosario_vampire_manga_tsukune_ghoul.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/kingdom_hearts_2._5_lingering_will_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7ff7451-228f-4688-a3a0-d360259db902/29195705055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bfd9858-dd9b-48eb-9c7d-427a2b8554e6/92144422920.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/40908534628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64a6a528-7f0f-4ed8-8478-f41d6e9f8699/79804358455.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_off0000c375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC375 5348 bytes
SHA-256: c2aaec3aaedbb128ce837e1603fe794ed3296b116f66ad625586caf7cf0ca27e
font_01_sfnt_off0000d590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD590 10532 bytes
SHA-256: 572b3102bd18b0dcedc01ff7803c64cc8a164851ab69d5f06dfd33602dec1564

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