Malicious PDF — malware analysis report

Static analysis result for SHA-256 7469e05ceb15793c…

MALICIOUS

PDF

86.7 KB Created: 2021-03-20 19:02:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d0a1bc7e50900a23548cce6257d46db8 SHA-1: 63129b0b3aa491f7f7f4db9eb4c9c5087f61a0c7 SHA-256: 7469e05ceb15793c5bebb02a867caabade8abbf9bfff4f0de26dffdb0b6b8923
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary external URI pointing to 'resalured.ru'. Heuristics indicate this PDF is a link farm hosted on disposable domains, designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/award?keyword=html+to+pdf PDF link annotation
    • https://nenilinuda.weebly.com/uploads/1/3/1/3/131383514/letadibu-nelaverilijas-xosazasuza-pufumanofifomig.pdfIn PDF document text
    • https://cdn.sqhk.co/zowajomi/fhijhjd/foxuwoj.pdfIn PDF document text
    • http://kuvenumine.mygamesonline.org/36996123897.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/gAVlsxs/billie_eilish_lovely_lyrics_mp3_download.pdfIn PDF document text
    • http://marinarus.space/scag_tiger_cat_2_61_kawasaki_enginefbglu.pdfIn PDF document text
    • http://stebsmeh.space/tijufokefifejuh3zsb.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/jYFgcha/lufifebiwajulawulutoxal.pdfIn PDF document text
    • https://cdn.sqhk.co/xaloridinef/ehj1jaI/37779872926.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/81944940270.pdfIn PDF document text
    • http://lefibipefazefep.mypressonline.com/ridapowepa.pdfIn PDF document text
    • https://pamigewome.weebly.com/uploads/1/3/4/6/134631685/kifuwukewa.pdfIn PDF document text
    • https://nojufetabug.weebly.com/uploads/1/3/4/7/134748112/7125204.pdfIn PDF document text
    • https://cdn.sqhk.co/virapazetif/h1dhgia/voice_recorder_app_download_for_windows_8.pdfIn PDF document text
    • http://jonebukusopovet.mygamesonline.org/what_the_bible_says_about_your_comfort.pdfIn PDF document text
    • http://prosucre.pro/bohnert_sheet_metal_miami_flpa1x5.pdfIn PDF document text
    • https://vumizopefi.weebly.com/uploads/1/3/5/3/135313358/9327025.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/21591a8b-39ec-4a1b-842c-669f0ff1f1c3/tegeluxenawi.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/jipemisoketafimukiw.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/14384666239.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/83009133795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72784a60-0e2c-4f27-9119-e9c60ac4507e/tiwupe.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/90181938706.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f934a982-94e2-4d87-9c49-bf30cc3c5073/who_invented_abstract_algebra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd23bfb5-6eb8-4c1d-a2e2-ec5d9dae7a39/96483088095.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_off0001171d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1171D 4664 bytes
SHA-256: ad4afd691dcfee6e254331a9f2043536ea4c55397ccb016e358e4055ee886f75
font_01_sfnt_off000126f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F1 11048 bytes
SHA-256: 1dae2a13112826f2b33c8e47da6449b6488bf2a99a473455d3bf151b106914c0

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