Malicious PDF — malware analysis report

Static analysis result for SHA-256 38354c6728061755…

MALICIOUS

PDF

35.5 KB Created: 2020-10-29 06:56:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: dc79f65247e139c79ca23e91aab38dd8 SHA-1: 1bd2cc0c8c4f74a92a0b1a87f4aab8248d6d6b6f SHA-256: 38354c672806175540c55e9b656c201de26af4b3bf08c2909e183a129096c61a
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ttraff.cc/123?keyword=labour+laws+in+india+for+private+companies+2019+in+hindi In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383912/normal_5f982eb38a64b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371240/normal_5f8a9e1e9505f.pdfIn PDF document text
    • https://rejigebejone.weebly.com/uploads/1/3/4/4/134462336/zuwibos_wijegeximopir_xuxexiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_5f8a882583745.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408983/normal_5f9a22bf7edb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370542/normal_5f9135e628969.pdfIn PDF document text
    • https://jemajodelevo.weebly.com/uploads/1/3/4/3/134394711/naxivobe.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/ab4a6e09-f358-47a6-b1b0-ab5c862d0b6f/52461272847.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6109/9675/files/the_magic_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a0347f6-c77d-4a86-a1d2-8dc2b25b7004/defubuwor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5301/3928/files/megaman_project_x.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/3319/8498/files/balanceo_de_ecuaciones_quimicas_por_tanteo_ejemplos_resueltos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0300/5086/files/mavic_2_pro_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/lillebaby_carrier_complete_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c1745c-6f64-445d-9ab7-30da4f8bf096/gegiletu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/6989/1494/files/new_marketing_techniques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bf7813a-9fc0-4925-b4c6-5a3aa7f6fff6/lakenul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6879/1228/files/total_war_rome_android_requirements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a21819-a503-46e7-9f9d-731e4a137fd1/rotmg_pet_abilities.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0762/5381/files/ejercicios_reglas_de_acentuacin.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_off00004d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D57 6108 bytes
SHA-256: 3e3559f1274e9b227be510c6a3ae85c93878fa3eb5b97345490111e96bb7c748
font_01_sfnt_off0000620f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620F 8916 bytes
SHA-256: 0e8ba75a9dcb88f2515cb60cb65568ab9f147c6d316d0453e39ae222c0d759ad

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