Malicious PDF — malware analysis report

Static analysis result for SHA-256 972b23d51dec9d6f…

MALICIOUS

PDF

68.3 KB Created: 2021-03-15 04:55:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 014c8e981018d2d7d7c5786497c1f6de SHA-1: 286ea8c06164cd12f115b2b159b44eb57f1a3dde SHA-256: 972b23d51dec9d6f2f2c21c3ec26281683d8c95f3e06bd823d0d20c29d3f6fe9
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration on disposable hosting and suspicious domains, indicative of a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests an attempt to direct the user to a potentially harmful site. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/wix?keyword=victory+elementary+school+portsmouth+va PDF link annotation
    • http://axecheat8.xyz/870920597415loms.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/dakaj.pdfIn PDF document text
    • http://nanonewe.scienceontheweb.net/angielski_w_tumaczeniach_gramatyka_6_chomikuj.pdfIn PDF document text
    • http://kvrovk.xyz/lewejimuf41xh.pdfIn PDF document text
    • http://masterpowerpoint.com/joc_balena_albastra8xc7s.pdfIn PDF document text
    • http://tadudibelebow.iblogger.org/how_to_trade_metatrader_4_ios.pdfIn PDF document text
    • http://edayafar.xyz/zixomiojxk.pdfIn PDF document text
    • http://cheatyou.site/armiger_warglaive_datasheety34js.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/8c882bc5-619a-40a6-9865-f474deb1119b/bowofilerozozipumumaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10193746-5f64-4d93-a419-c50ddcfda0fe/62320138389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/442f94a0-0068-4890-be3f-d27c33d653ee/tuck_everlasting_chapter_17_questions_and_answers.pdfIn PDF document text
    • http://girofili.myartsonline.com/31148950971.pdfIn PDF document text
    • http://siragen.epizy.com/21572962165.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/092e862c-879c-4600-8b47-81ec6b53657c/tuzufivobumozokav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cdb3281-6e9c-4c0f-9abe-91646f5c7ed7/25691025152.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/hbr_must_reads_on_managing_yourself.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/85819739464.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ab7f98c-0015-4973-9781-8cf188edf129/55712458970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d0bbbe1-0c9c-47bb-a46b-6dd389d2bebb/58974620217.pdfIn PDF document text
    • http://guvivewemubalef.epizy.com/manepuburi.pdfIn PDF document text
    • http://jinibodakix.epizy.com/wusatekufidasurod.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/auriol_radio_controlled_wall_clock_manual.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_off0000cefd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFD 5300 bytes
SHA-256: 1a0c349b8ab1d7dc215d08624207d8cef06d2a81399eae807dbc183dfc6f6c9f
font_01_sfnt_off0000e0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E5 10164 bytes
SHA-256: ea69d14757e4be998d9907f5e80ab93371b88b224c6c94fdb0f6538261e414a1

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