Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b9cd604b182b59d…

MALICIOUS

PDF

81.3 KB Created: 2021-03-14 16:05:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d3ae7b9d00f82ca13679e3b546dd96b5 SHA-1: 2f41b10e6a6176f355175544b9d8f865a49078de SHA-256: 0b9cd604b182b59d546ca355fa37f53cb09b24bc719b4105e9181964a539581a
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one prominent URL leading to a domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a malicious site for further exploitation. No scripts were extracted, but the PDF structure and embedded links suggest a phishing or credential harvesting attempt.

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://xezojetit.ru/award?keyword=barnes+and+noble+application+pdf PDF link annotation
    • http://norudumof.22web.org/makem.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/hibjaTK/87131308634.pdfIn PDF document text
    • https://mejebepagomuda.weebly.com/uploads/1/3/4/4/134494428/1793744.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/cardinality_of_a_set.pdfIn PDF document text
    • https://cdn.sqhk.co/samigimas/SOLQVhc/to_the_moon_phora.pdfIn PDF document text
    • https://matasomorat.weebly.com/uploads/1/3/4/4/134492922/mimujatiniwukur.pdfIn PDF document text
    • https://misirukizos.weebly.com/uploads/1/3/4/0/134017349/af586.pdfIn PDF document text
    • https://nakalefa.weebly.com/uploads/1/3/4/5/134522788/nofoxozitagor-pigizarapud-minonolazuk.pdfIn PDF document text
    • https://cdn.sqhk.co/musutalivun/jeAtsaa/mod_creator_for_minecraft_pe_apk.pdfIn PDF document text
    • http://jupofara.22web.org/8808358582.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/digital_communications_specialist_job_role.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/ibhd4hg/chelsea_glitter_damask_wallpaper_silver.pdfIn PDF document text
    • http://jinokonur.22web.org/vebepixanufa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dojeranorered.epizy.com/60086550413.pdfIn PDF document text
    • http://ketabigumowun.atwebpages.com/sujet_brevet_maths_2020_corrig.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/61213014812.pdfIn PDF document text
    • http://lagunuriteg.rf.gd/69924044205.pdfIn PDF document text
    • http://jexititojule.rf.gd/xifawufoziw.pdfIn PDF document text
    • http://gijenuja.epizy.com/685494446.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_off0000fedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDD 5336 bytes
SHA-256: 2a6d14418a0940abbf72e69ea0b65b3a13384004cf3849317957100d45ef0121
font_01_sfnt_off0001110c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110C 11544 bytes
SHA-256: 7db2a9da08da1b7ab1a08981126baab26dfa1ab6f8bec0f29d2577418ad511d8

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