Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d34fe4b93678ad6…

MALICIOUS

PDF

73.4 KB Created: 2021-02-28 19:24:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 49c85d0eb3552ed6c74202cfa44f8189 SHA-1: 240690b7d3afda4be49e58c1e0be56832214ea2f SHA-256: 9d34fe4b93678ad62374d1aadefc6192b7cdd2c10fd8b56f3639dd6b306b57f1
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs that redirect to various websites, some of which are flagged as link farms on disposable hosting. The document body mentions 'Harry Potter and the half blood prince book pages', suggesting a lure to attract users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/123?utm_term=harry+potter+and+the+half+blood+prince+book+pages PDF link annotation
    • http://adr-media.work/bsnl_tower_complaint_letter_formatvbbgs.pdfIn PDF document text
    • https://gisoroweri.weebly.com/uploads/1/3/4/8/134893792/tabed-jozogudaj-monalis.pdfIn PDF document text
    • https://cdn.sqhk.co/bisidilit/Yepsgjn/spider_stickman_dismounting_software.pdfIn PDF document text
    • https://cdn.sqhk.co/kinifukix/dXhajig/xiwudolugaronujosowi.pdfIn PDF document text
    • http://vifijes.22web.org/56912856722.pdfIn PDF document text
    • http://jevafurevozu.mygamesonline.org/it_is_called_the_age_of_reason_renaissance_period.pdfIn PDF document text
    • https://nafizanoride.weebly.com/uploads/1/3/4/5/134596231/bamog-fuzinilifuxar-nagubovi.pdfIn PDF document text
    • http://politach.com/jersey_city_bus_ticket_price8ykn2.pdfIn PDF document text
    • https://rilawexiretik.weebly.com/uploads/1/3/4/2/134267086/baroba.pdfIn PDF document text
    • https://setibadumizokeg.weebly.com/uploads/1/3/4/8/134880372/wadizol-jokilolenujox-gebugakimipif-bulapolo.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/ohijgV4/debt_snowball_calculator_app_iphone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377410/normal_5fe30234c0c0d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mesitineka.rf.gd/34840175640.pdfIn PDF document text
    • http://safatagikev.rf.gd/54892713627.pdfIn PDF document text
    • http://tuwutexo.onlinewebshop.net/kupupaxegelum.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_off0000e0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C4 5684 bytes
SHA-256: f66bc85a7523fb7ce86d930f3a0321bc5d282bf4ab1d7418b2b477ce1b2be2d5
font_01_sfnt_off0000f41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41D 10692 bytes
SHA-256: 6d95ca5a31b099085820ccc40ea9327d91f680dd3ad0b88055b99f7afdc41e50

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