Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f6e7f42374a5864…

MALICIOUS

PDF

70.9 KB Created: 2020-11-19 17:44:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e90fe8fb01d4fba4ef0d1328ba67ffdf SHA-1: d52ff4f4dfb538dde8d80f09a7ef166f0def70f1 SHA-256: 3f6e7f42374a58642411cdd9077b2023d9fd4b1f862def4222954e0dff377d6f
186 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 6

  • 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.
  • 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://trafficel.ru/123?utm_term=boyle%2527s+law+experiment+answers PDF link annotation
    • https://sawebegiwe.weebly.com/uploads/1/3/4/7/134706463/137330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368741/normal_5f9a13f5cde69.pdfIn PDF document text
    • https://sevakozo.weebly.com/uploads/1/3/4/6/134677934/baxaviboziro_tezev_latitelok_jazuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374535/normal_5f9c3cf7da956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368996/normal_5f8d0cf63225c.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/koroxusegivezenatuta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_5f909693bb9cb.pdfIn PDF document text
    • https://nanezafukixepa.weebly.com/uploads/1/3/4/5/134526153/fowovuti-kupaginagaxaw-kodojurin-gixebaveled.pdfIn PDF document text
    • https://vosokujegenukof.weebly.com/uploads/1/3/4/4/134474729/1272713.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/pusolefosex/51207370143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/830bab43-a15e-433b-9025-1683f974e194/krishna_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0377998-5fb1-4700-b111-51bdf78b0e0d/rinobojexavavigovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40c95d67-45d0-4356-9757-4f45a6bb809d/descargar_plantilla_para_cd_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de50c06c-ff0f-4b02-96dc-070b995a6cb6/zoo_tycoon_2_animal_downloads_sites.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7abb66f-e3bd-4208-8937-d898a2f9318d/sous_vide_recipes_anova.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DF 5312 bytes
SHA-256: a531970119870294c73a605812e54c122672d666d147f873dac2d80ed03ceb35
font_01_sfnt_off0000e902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE902 10992 bytes
SHA-256: 4180d7f3d929bcc970535f6939a8c7a825beffc4644f32a8394a73dda01de432

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