Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9ab576a738cb72…

MALICIOUS

PDF

42.9 KB Created: 2020-11-09 05:48:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 31811cebcd26bf4d733d9067179636b4 SHA-1: 9df60c56f385364703f154a8a72ca4688ddcd2b2 SHA-256: 6e9ab576a738cb726a4059390eee091b608a5ea45f784e95c0be35b330252d1f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?keyword=all+my+friends+are+dead+pdf PDF link annotation
    • https://sipimivib.weebly.com/uploads/1/3/4/6/134657766/nemitev_kokoti_dedemozox.pdfIn PDF document text
    • https://dawiganolakegoz.weebly.com/uploads/1/3/4/3/134367714/e58d510aa.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/312c946d-74c9-4dcd-99f7-1b3213ae8ee9/gillette_fusion_manual_cartridges_8_pack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b965c85-ac65-4820-8d13-4cacd68ea994/ddo_items_with_true_seeing.pdfIn PDF document text
    • https://teniseti.files.wordpress.com/2020/11/cocina_criolla_nitza_villapol.pdfIn PDF document text
    • https://siwereja.files.wordpress.com/2020/11/74219477726.pdfIn PDF document text
    • https://teniseti.files.wordpress.com/2020/11/orcs_must_die_2_strategy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3b44551-55c6-4351-b4ac-4c7008d4e0cf/detulinanunamadugika.pdfIn PDF document text
    • https://vivader.files.wordpress.com/2020/11/tratamiento_del_trastorno_antisocial_de_la_personalidad.pdfIn PDF document text
    • https://juvibix.files.wordpress.com/2020/11/wazasusegupaxusijip.pdfIn PDF document text
    • https://xekegaxasal.files.wordpress.com/2020/11/molagizogagez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dabe4eb-40e8-4023-a811-682a92f3c61e/79754690406.pdfIn PDF document text
    • https://zuwitapip.files.wordpress.com/2020/11/dugamaloti.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_off0000694b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x694B 5276 bytes
SHA-256: e4002dd28b5ea36a12ba19bc67638736ef630005e12a4755f9c65bdfb011ee11
font_01_sfnt_off00007b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B37 10384 bytes
SHA-256: e89022c0a59559a664957e0be96402602fbacb44829f49b90fa2f9679f9f44b4

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