Malicious PDF — malware analysis report

Static analysis result for SHA-256 f656e7dbfde2d673…

MALICIOUS

PDF

72.7 KB Created: 2021-03-11 11:47:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b11fa28ed5d96cc8e13f245d7b2ca14e SHA-1: c93c7f37169ac340319292231852789bfb12a976 SHA-256: f656e7dbfde2d673c63fb534d439f211f67f01eb5b9f36fc007b0e79e06df780
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/123?utm_term=cephalopod+pronunciation+guide PDF link annotation
    • http://tomolijoponix.mypressonline.com/moviesflix_in_download_fifty_shades_freed_2018_hindi_480p_720p_1080p.pdfIn PDF document text
    • http://xuputunoxukir.22web.org/rajedafajoma.pdfIn PDF document text
    • http://mujumuvibofa.iblogger.org/2723541039.pdfIn PDF document text
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/timazek_xuvut_tatejiz_gebaj.pdfIn PDF document text
    • http://mafejaruvoje.sportsontheweb.net/balancing_chemical_equations_answers.pdfIn PDF document text
    • https://gewefasawetuje.weebly.com/uploads/1/3/5/3/135315234/183167.pdfIn PDF document text
    • https://serewutedirafam.weebly.com/uploads/1/3/5/3/135339767/gexikiwujepunewufo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407070/normal_5fec3638d15d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366401/normal_6004f6d0e99bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370062/normal_6008757cd57f3.pdfIn PDF document text
    • http://kevifiregerufug.scienceontheweb.net/6573132135.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480755/normal_600ec00d60fd8.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/43f519cb-fa90-49ac-92a7-4972ac0c4369/how_to_find_slope_intercept_form_passing_through_2_points.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecee4078-a667-409c-a871-543965b221a1/jodifefol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/907f4961-950c-4295-bba7-cccf5ae7e9c5/dungeon_master_tools_conan_exiles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22315dd3-cbac-4a9c-b9a2-69dca7566d20/bezozabidalof.pdfIn PDF document text
    • http://ketavulamuxi.epizy.com/fatomifazulafowufajiru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d233333-9d9e-4f5d-80dd-1068c009f6b1/vafizaxotovosoxudijobanun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e56e92f-11db-4d05-b24b-6f56a468771d/51208439642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24ba70e0-0003-4835-b447-1efa9b5279f0/discovery_mindblown_model_engine_kit_instructions.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_off0000dc7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7F 5060 bytes
SHA-256: 50861fcd3f5ac2d567bbbcf784b7b5aa17a4a61984c0a8ef935bd60e45214f70
font_01_sfnt_off0000eda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA6 11964 bytes
SHA-256: d53c9f6af79eb57052e8d55a4da397acff5d38bb1b77a21f9c0824c8aecd017d

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