Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6108b2c065948ed…

MALICIOUS

PDF

35.0 KB Created: 2020-11-06 14:20:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fa89898b1894b6822f8ee4bf152f81f5 SHA-1: 90be9330db16cff2141e25e9e8ad9ff305a803ff SHA-256: b6108b2c065948edd53c029f464374d913db24cba569e497be41e39148168f43
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://trafffe.ru/123?keyword=peavey+bandit+112+amp+cover PDF link annotation
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/9276785.pdfIn PDF document text
    • https://jetizapu.weebly.com/uploads/1/3/4/3/134371104/1108a32.pdfIn PDF document text
    • https://tigamapelexoka.weebly.com/uploads/1/3/4/6/134633170/4649f2d53c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f99ecbd2a9fe.pdfIn PDF document text
    • https://gamupizesusaza.weebly.com/uploads/1/3/1/3/131398140/posubuxapeb_fufivito.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/067a1912-dd31-48a7-b6e7-2fe8439821cc/walemavilebajigasofil.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/auld_lang_syne_robert_burns.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/coc_apk_mod_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07419b8b-1789-4627-a749-9711bd48c469/zuzasivujiropokotanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e56f0e38-4a68-40a6-be48-9958f6413bdf/63506705356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89a2002b-36a9-446a-b11d-c0f27f1edc10/jareja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db4d5446-c857-4b78-acc6-4be252fdea15/bamakoritinodufot.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_off00004760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4760 5496 bytes
SHA-256: e89331a9704b3643d2640b91e436a016313ab201ab752050d3b8d51d6d9a24a4
font_01_sfnt_off00005a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0C 11084 bytes
SHA-256: 018e8a259a21bb2fbd766bd718835b801a9d5dd5d5a73d9caf27685beb835231