Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d1afeac1bb3db14…

MALICIOUS

PDF

42.2 KB Created: 2020-11-07 16:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a0509d5d840f87128dfee1c15fbef02f SHA-1: 93b93d1449c291b61a10093c5c6fb2b13016eccf SHA-256: 7d1afeac1bb3db14e1099444c78e15613f6e6a3b2078290e469347b50ccd7b2e
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://traffine.ru/123?keyword=canciones+de+los+dias+de+la+semana+en+espanol PDF link annotation
    • https://xavixikani.weebly.com/uploads/1/3/4/5/134502132/rufifoziso_degubumeloli_belinasej.pdfIn PDF document text
    • https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/0a624dda5efcfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376357/normal_5fa2436db8dad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448740/normal_5f9ee52219fca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422372/normal_5fa629aa6cbfb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/8620584136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae1bcf0e-3337-4f2e-af58-c809ae7f1697/rupinder_gandhi_2_whatsapp_status_video.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/family_guy_quest_for_stuff_cheat_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c4902f8-f102-4268-8c08-45bab38d9202/ruger_p89_disassembly_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/56728319278.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/all_antonyms_list.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/non_abelian_group.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d84e30a1-cf5b-4905-976a-ca22ec8cc2d0/mukunuxujavufawevaju.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_off0000622b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x622B 5028 bytes
SHA-256: 6bcaa1697c3e714c3fe67cc445301b613e9adc748e2787c7a2f58515ce1fb6bb
font_01_sfnt_off0000732e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x732E 11964 bytes
SHA-256: 34cc6efd855c27ed8b6f149553eec8f7285577e3ee8e7c3dc8675f6c135c00d2