Malicious PDF — malware analysis report

Static analysis result for SHA-256 956d1e4619c56849…

MALICIOUS

PDF

79.8 KB Created: 2021-03-14 01:55:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9d2066d8a5d848e559ac842d334e7f6d SHA-1: d695eefcda91dd4cc953345f8570453fca451bc1 SHA-256: 956d1e4619c56849631f54f9c68d4b036183706bda7b85092119dcc7f43395e2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with several heuristics indicating it functions as a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=how+tall+does+the+book+of+enoch+say+the+giants+were PDF link annotation
    • http://lg-copyrightforms.com/the_lion_the_witch_and_the_wardrobe_television_series64xyi.pdfIn PDF document text
    • http://copyrights-notices-helps.com/adpkd_screening_guidelinesk7v9l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492529/normal_60241e007f7af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368474/normal_5fccd0f4e1a03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383471/normal_6030dac179e5a.pdfIn PDF document text
    • http://nepatokada.mypressonline.com/premier_protein_cafe_latte_caffeine_content.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/dafevatokexilabawovix.pdfIn PDF document text
    • http://cleaner-inn.club/the_beautiful_poetry_of_donald_trump0vxwy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384652/normal_5ff4fbce3cb9f.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/nextbook_8_tablet_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459166/normal_60241bceec018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425511/normal_601f4111c0f17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449987/normal_6009f58a55b96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469135/normal_603e956f1e7a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482869/normal_603657cd12f93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450439/normal_603ff44bcad13.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jugugesazo.myartsonline.com/balancing_redox_reactions_by_half_reaction_method.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/pilevuzadarokofopuguk.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/ingersoll_rand_ssr-ep_15_u.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/gidazi.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_off0000f843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF843 5640 bytes
SHA-256: b5981e1c959d21eba752610119e6809bc953e778f9b8a7c4796832cade1528f7
font_01_sfnt_off00010b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B86 11100 bytes
SHA-256: 29a891af6b175aacd8d7a3d00fef6c747a50bfe84c6077bb51800785888a63fa

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