Malicious PDF — malware analysis report

Static analysis result for SHA-256 55500b393c19493b…

MALICIOUS

PDF

75.4 KB Created: 2021-04-01 00:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: fade38d8ea97cec30e0ff1a795b1565c SHA-1: 6fd7f2e73cef88b02164cb10f6558b51594e3f96 SHA-256: 55500b393c19493b66bc9c6dfbf8d09ca03b259f4921ac0aa5b813223daaf092
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect users to malicious sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/wix?keyword=mi+fit+apk+4.0.15 PDF link annotation
    • http://xawamiwupajev.mygamesonline.org/83122576582.pdfIn PDF document text
    • https://sujolatako.weebly.com/uploads/1/3/4/6/134624807/5210331.pdfIn PDF document text
    • https://bitojobuf.weebly.com/uploads/1/3/4/8/134892495/ribawi-deleb-biwotof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403680/normal_5ffcaa1c01487.pdfIn PDF document text
    • http://islemleriniz.org/kinixenujid5d410.pdfIn PDF document text
    • http://biggymstoe.com/watewawojuraxituxisaran0tl82.pdfIn PDF document text
    • http://yoga-fitness.space/whirlpool_bottom_freezer_ice_maker_problems10lyj.pdfIn PDF document text
    • http://jiteruruw.sportsontheweb.net/que_es_el_analisis_foda_personal.pdfIn PDF document text
    • http://pshcomonhere.xyz/75357658038nwpql.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487632/normal_601a56bd9894a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460460/normal_5fe428aa7388f.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/levaxuxoruxamajep.pdfIn PDF document text
    • https://sonujesenusa.weebly.com/uploads/1/3/4/3/134344018/fazomabupe.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/bc4228d077e5.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/9223082809.pdfIn PDF document text
    • https://xijiruxexewige.weebly.com/uploads/1/3/4/7/134725886/mijawavoxikatu_buwodeko_naluweso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rebobimakefeli.epizy.com/company_stamp_guidelines.pdfIn PDF document text
    • http://zufizuride.rf.gd/71486190577.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/the_last_leaf_poem.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/bottom_bracket_cable_guide_halfords.pdfIn PDF document text
    • http://kexeban.rf.gd/nazipafikezofebagizo.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/lagisuk.pdfIn PDF document text
    • http://waxodomopupu.epizy.com/3893484684.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_off0000eb2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2D 5096 bytes
SHA-256: 814d42ed36ee2a54d328ca024282f05af2cf90cf27d53e0d42ca269517f51885
font_01_sfnt_off0000fcc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC0 10416 bytes
SHA-256: b6d2d51cc99ac459729fa5ed6015eb07785074493c5615cfddff84a125def9a9

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