Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e19300ec8da5e78…

MALICIOUS

PDF

74.2 KB Created: 2021-03-19 01:40:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 812089c9b6a5951d4f5576d35f295c08 SHA-1: 9407aecb0b20d58373258a98f4a67f04dbb7688a SHA-256: 4e19300ec8da5e78b29f0b4edf7a6fd0f1766fb8493232e07f9fb4c2439a37c8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

Heuristics 5

  • 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 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=product+specification+sheet+en+francais PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485578/normal_6030fa0ea112f.pdfIn PDF document text
    • http://xajuguzim.iblogger.org/be_with_you_2018_eng_subtitle.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489730/normal_6003c562496aa.pdfIn PDF document text
    • http://sewowenokep.iblogger.org/sleeping_songs_in_tamil.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/alan_watts_wisdom_of_insecurity_book.pdfIn PDF document text
    • http://potuxoposutu.medianewsonline.com/star_citizen_all_ship_prices_in_game.pdfIn PDF document text
    • http://rorixuge.iblogger.org/susimenireriwogekirod.pdfIn PDF document text
    • http://geloritiveda.mygamesonline.org/kabeniwosasa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_600f2667720e7.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/e133bc48-060b-43e4-b8ab-92888737b3b9/nekupexafove.pdfIn PDF document text
    • https://1237a3da-0b33-4890-9ba9-974507bf2590.filesusr.com/ugd/3e0cb9_422cd86084ac42b3b949d6e72199144e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/5700923247.pdfIn PDF document text
    • https://3c3713de-992c-4571-92b4-00afcb8cb2c1.filesusr.com/ugd/9dbdb2_17015d8cfdc14f2793a49b8efe6e1f87.pdf?index=trueIn PDF document text
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_00a13d84011e45cc9761019976f0cdbc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/aliens_vs_predator_2007_full_movie.pdfIn PDF document text
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_7f7605245f2c4d14a16d80c6e139536c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a9bfcb8-c8ff-4541-b790-7cacb6b89638/nisojivonofoz.pdfIn PDF document text
    • http://lawesiwewif.onlinewebshop.net/absorption_spectroscopy.pdfIn PDF document text
    • http://natadomemorad.epizy.com/rabubixuk.pdfIn PDF document text
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_9692a8cf0b3b4493b496a15c9a12daf2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/51607717102.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_off0000e157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE157 5212 bytes
SHA-256: f64c92ecb27f5dc18f6b1bcebd22beec8aa70a605084776da9205fe1058cb48c
font_01_sfnt_off0000f30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30A 11668 bytes
SHA-256: 38e81e7f0dd00a766fee4a0d6405e5c24a07c581a82774215cf8a71b8003c83a

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