Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d7931b7a53c6767…

MALICIOUS

PDF

108.0 KB Created: 2020-11-07 00:47:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2f92859a7809c6811ecd5d54d091320a SHA-1: 3fb9411b196ed54110c4d35190f9c26ebf3cd59f SHA-256: 1d7931b7a53c6767b9a232589a1eba12899d9bf9dbe5b74988b0d9a9e18be4ca
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://traffset.ru/aws?keyword=trojan+war+timeline+dates PDF link annotation
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/4386fbc77ac3a8.pdfIn PDF document text
    • https://zogeliwev.weebly.com/uploads/1/3/4/3/134353139/bujijos.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://s3.amazonaws.com/risalenefazozo/samsung_one_connect_mini_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aed6f94-665e-442e-bafa-75e47fdd1657/raices_cuadradas_ejercicios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0199f5a-2da0-4dc7-a46b-4cc1b584cf75/canciones_d_barney.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/721d3a11-5f39-4288-beaa-5c7d786040a6/kubexojinezifuvopujumagap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e47280a-bfec-4f6b-b2e5-62b74f83460c/98202673280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a51aa5d-db4b-432a-a36a-4b7402bdb547/85797928849.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/diy_canister_filter_5_gallon_bucket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aec89c6d-7a5c-4ac8-9273-b9f2ef4b82a8/77035742095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/803ba2f9-ad8b-4d42-87f5-b8506fc731bf/69484285070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e30f35c9-faa7-49d1-a6b5-4b90b57bcbbe/tijerulajotemomujovulobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e10d510c-758b-44a9-bfcf-ae6a4877f749/35541684713.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d7310b2-67eb-4abc-9d4f-88d7361bb499/febamasajog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07991c97-29fd-4bfa-99ad-caca7fbb829b/aeroplane_driving_simulator_games_free.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_off00015248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15248 4876 bytes
SHA-256: d17f203ad65e19f3e6121a157c59c04c41c0422619cfcdb17532d7755492edd7
font_01_sfnt_off000162cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162CB 16668 bytes
SHA-256: 761d02efa67c4919274e4e80ba152695c7fae71491f72742f61f2baf79b745c3
font_02_sfnt_off000194db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x194DB 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f