Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc0bb83bb52085e4…

MALICIOUS

PDF

45.0 KB Created: 2020-11-09 05:25:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bcb8fcfd45a54b43f926109698fdec8d SHA-1: dc7159a5e81c62fba890a63b0ca78b7af924fba4 SHA-256: bc0bb83bb52085e41c81d32b47fce14aae213349a9369e590e46e01294a1e353
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by 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 1.0000

Heuristics 4

  • 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/123?keyword=unblocked+game+world+66 PDF link annotation
    • https://pareropifu.weebly.com/uploads/1/3/4/3/134349273/rexapev.pdfIn PDF document text
    • https://gekilatati.weebly.com/uploads/1/3/4/3/134378061/6306288.pdfIn PDF document text
    • https://nigokozop.weebly.com/uploads/1/3/4/4/134436215/wepibop-dowemis.pdfIn PDF document text
    • https://mafogidafefuzu.weebly.com/uploads/1/3/4/3/134334422/1687325.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/2d87f790-95cf-4a62-a392-eff0cf01290a/xogafalesilutewanovemig.pdfIn PDF document text
    • https://gazolikid.files.wordpress.com/2020/11/ratijejevigumewetejetin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d6a2bdb-e470-452e-bd72-549697424617/vamowiwowoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0238eccc-d59d-4eda-b77c-06a277474799/watch_twilight_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c3e048b-e923-421b-a0c8-074846cd97cd/manual_recycling_baler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e465879-ed6b-438d-9d16-4ece67e98cba/todd_snyder_champion_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d00310d-8f05-4fbf-bc98-2e7ef2c13555/mario_kart_8_wii_u_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4dfc1fc-7161-4e1f-932f-1a73b278f58b/fonozudufebebula.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_off000070f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70F8 5520 bytes
SHA-256: 5d2286defff73368be93f2a629cfa69d114dc84074023485a5fae9493b069347
font_01_sfnt_off000083bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83BD 10572 bytes
SHA-256: 38649eb30db5413ba68a5573db0221351f795a67a77cc69856f7ad787f6b2dfc