Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d4e01cf5fcff608…

MALICIOUS

PDF

83.0 KB Created: 2021-05-28 22:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: a3977a575df4383cc6cbb61060fcd9c4 SHA-1: 4399c78baba6a4cb2b8de385a7c36f0290110483 SHA-256: 5d4e01cf5fcff608bd88b7d3986d5d1b3bec6cd308fd8f1819d7dc3f6121be4a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links pointing to various domains, many of which appear to be disposable hosting. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious payloads. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://cdn-cms.f-static.net/uploads/4416671/normal_604b09d5e03a3.pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4391599/normal_5ffb69830b30f.pdfIn PDF document text
    • https://wojatobarub.weebly.com/uploads/1/3/4/6/134612389/8c861e.pdfIn PDF document text
    • https://bosuzegenelulu.weebly.com/uploads/1/3/4/1/134131522/e6bae0f.pdfIn PDF document text
    • https://pofifeluvoka.weebly.com/uploads/1/3/0/7/130739131/fugebokerenilox_roruzopodugoxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421207/normal_5ffbd4c1df6c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450250/normal_605b483040fa2.pdfIn PDF document text
    • https://teditiwos.weebly.com/uploads/1/3/2/6/132681477/18dcb0d48.pdfIn PDF document text
    • https://xekuruwagimutuz.weebly.com/uploads/1/3/2/6/132696141/papizirereba-nodevuzuto-kuguruva-gapifisazov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444852/normal_5fec4264e6b7c.pdfIn PDF document text
    • https://neruzokari.weebly.com/uploads/1/3/1/1/131164447/fidenomasok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451220/normal_603354b53d221.pdfIn PDF document text
    • https://karinavoru.weebly.com/uploads/1/3/4/0/134017817/serebipisu_vizazufame.pdfIn PDF document text
    • https://petominezejoza.weebly.com/uploads/1/3/2/3/132303337/befivewowenadod.pdfIn PDF document text
    • https://fixaporaxaju.weebly.com/uploads/1/3/1/4/131413905/d9956702.pdfIn PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/tujimimolakuvoporiga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/o_fyKxYoRT8/wb?keyword=what%20is%20a%20good%20low%20purine%20dietPDF link annotation
    • https://uploads.strikinglycdn.com/files/ce565a7b-b252-47b2-97df-f2677433a097/does_slither_io_cost_money.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f39180b6-4b26-4866-8c9e-ecb40a86de95/how_do_i_make_an_appointment_to_get_my_permit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3a661ae-247d-4d71-b9f1-2ea34438e7b6/71197343778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70ccf50d-d855-4bb0-9d3d-e9cef237500a/relentless_book_8_karen_lynch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a876f81e-0a59-418e-a3ee-7ab6350927da/jofojevisulikij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97639789-ca76-451b-b1b7-38e9c5058391/fact_and_opinion_examples_sentence.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19a75c87-c5b9-481b-a837-32719a8ddb9c/tarot_decks_for_sale_pakistan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e75fba2-d2d4-4546-80a7-aba9b699ee13/how_to_use_a_celestron_barlow_lens.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_off00010691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10691 5324 bytes
SHA-256: ec42db1f5c62f63f6970c84632f301702f2b7754db1e05fe04ffec8679c8ab7c
font_01_sfnt_off000118bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BF 11216 bytes
SHA-256: 4b216692c428344d7820da2e13483aaa369b4482941d296bfc868b66ba1cfc17