Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ef683e2ddeeeadd…

MALICIOUS

PDF

68.6 KB Created: 2020-11-23 13:00:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 254e64ed2e9488edbb558d67fc15988e SHA-1: 9ccdd6c6a6c2d50cbede316450cd070d4b6bd6b5 SHA-256: 9ef683e2ddeeeadd61694743fe72cc07ab430cabc5d00117b3483836c033e35c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and 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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=100+pushups+a+day+woman PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392462/normal_5f912f9c85aee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_5f8748647b4cd.pdfIn PDF document text
    • https://rixidagetowema.weebly.com/uploads/1/3/4/6/134612143/jubamiwonofapikep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386605/normal_5f9645f2a6f41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387931/normal_5f91a137a4613.pdfIn PDF document text
    • https://dokakida.weebly.com/uploads/1/3/1/3/131380589/e0101228.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/kavitokolezub/starboard_value_olive_garden_presentation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/481f6fbf-10b1-4e6e-a966-a0c4909b4bb3/albuquerque_white_pages_addresses_directory.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/pro_blast_xl_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8cb5bdf-6389-4e2a-a8cf-8e51952670ea/74101264717.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/42691318121.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/48717378356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/805c2f56-1cad-4c1e-8163-b65568e8795c/93209062155.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/kenmore_stacked_washer_and_dryer_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38a498d5-d7df-4e49-bbbf-9f6321f696ff/40309487589.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5438bb3f-0b78-4f70-933c-86d9ae0033f5/geometry_dash_apk_2.111.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_off0000d025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD025 5364 bytes
SHA-256: 1d41788f338d813044b3e31670957fb03a4bf6492e12e1b8b1a3d350c9c87968
font_01_sfnt_off0000e254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE254 10256 bytes
SHA-256: 30a7a14ad88c95085f1446d9741ab356332fd536ab1774f703bafbc15bce2abb

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