Malicious PDF — malware analysis report

Static analysis result for SHA-256 f651b86588c91801…

MALICIOUS

PDF

77.1 KB Created: 2021-03-29 06:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 740b56815e2b077426ac0c5e8dcea2df SHA-1: b136cb28fb7df6b4858158e5a3b3662981960887 SHA-256: f651b86588c918018a10e76a648261adbbbff459b7c33a1679d7afad6ae03fa5
66 Risk Score

Malware Insights

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

The ML classifier strongly indicates maliciousness, supported by numerous embedded URLs pointing to potentially malicious or link-farm domains. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a tactic to manipulate search engine results or distribute malicious content. No scripts were extracted, but the sheer volume of external links points to a content-luring or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://pelibifir.ru/wix?keyword=frases+de+la+biblia+para+jovenes PDF link annotation
    • http://falilufip.iblogger.org/que_es_la_doctrina_monroe_y_el_destino_manifiesto.pdfIn PDF document text
    • http://poxijirubulemax.22web.org/cactus_guide_echinopsis_calochlora.pdfIn PDF document text
    • http://tepabevej.22web.org/vancouver_cost_of_living_world_ranking.pdfIn PDF document text
    • http://ribininewo.22web.org/cambridge_advanced_learner_s_dictionary_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_ee3a68e0fb4847279689e1dd99cfe246.pdf?index=trueIn PDF document text
    • http://fomajunelafid.epizy.com/troy_bilt_tb240_honda_engine_spark_plug.pdfIn PDF document text
    • https://c580675e-8888-491d-8c80-3106eaac86fb.filesusr.com/ugd/c8a981_25d827a3b7eb409094001ad7ecfa863f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/defipedibe/tadipumavapibejo.pdfIn PDF document text
    • http://sevixazoma.rf.gd/54587659512.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/best_hindi_short_stories.pdfIn PDF document text
    • http://tupemovon.rf.gd/92542147040.pdfIn PDF document text
    • https://def26600-86c9-4442-a738-094ddf2992d1.filesusr.com/ugd/eb5a6a_0da1f5556cbd4c6d8985bad8c3b62802.pdf?index=trueIn PDF document text
    • http://babotos.epizy.com/4895642089.pdfIn PDF document text
    • https://3c86e5df-9a55-47dd-9d5b-c207b25ec6cd.filesusr.com/ugd/72bf36_87adb8ed06524f81a11f9d7b59aa11b4.pdf?index=trueIn PDF document text
    • https://a819be37-316e-4347-83bc-b067fb6953c8.filesusr.com/ugd/d5662a_96c2c87e628947fcb0b2f23fd588eaba.pdf?index=trueIn PDF document text
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_f008d0d837524e06bd96276748de99e0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/archicad_learning.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/jututajewegowejexisa.pdfIn PDF document text
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_323586d59dc34770a2e1515e14f3797c.pdf?index=trueIn PDF document text
    • http://kojodidekojamu.rf.gd/tosuretar.pdfIn PDF document text
    • http://ganiwozipowure.epizy.com/midas_touch_book.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_off0000ed60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED60 5184 bytes
SHA-256: baed167ae162c9fdb9f09d9e897e8a58af016a4440771a8644a83ef56367425d
font_01_sfnt_off0000ff15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF15 12064 bytes
SHA-256: 2b1435642cc14b62a7d370800c82bdd55402e2bfa421f1a61993e9d80aab0098

Open this report in the interactive analyzer, or submit your own file for analysis.