Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ffa55df7531b84…

MALICIOUS

PDF

80.3 KB Created: 2021-03-22 04:47:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c7563a0e90304a397bf5772f16ba0345 SHA-1: e3ca2da4ce32eed2acca7cf8e263b3a718f4b2e8 SHA-256: 62ffa55df7531b84f12bc224e4b38c2edc8f10e1083f537d8abc7ba77c535fdf
134 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF utilizes a link farm hosted on disposable domains, with one URL pointing to a PDF that appears to be a lure for downloading content. The presence of external URIs and a visual download button further supports a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/award?keyword=civil+engineering+handbook+pdf+free+download PDF link annotation
    • http://zobotalemogi.sportsontheweb.net/67410680171.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481831/normal_5fe381c17fe31.pdfIn PDF document text
    • http://itawegan.fun/how_to_turn_on_icloud_music_library_on_ipod_nano_4th_generationpdt78.pdfIn PDF document text
    • https://nidozasa.weebly.com/uploads/1/3/4/6/134680612/nomotikepuz_pikot_mosat.pdfIn PDF document text
    • https://fexaxotira.weebly.com/uploads/1/3/5/4/135401388/lovurizikofakij_kizifepoge_zokotur_jukupukodomaver.pdfIn PDF document text
    • http://lnstagram-helps-contact.com/jazotivutidewufovikitfbtgo.pdfIn PDF document text
    • http://paypallsecurity.com/65160086207usz9n.pdfIn PDF document text
    • http://fejazeluxuz.22web.org/882134445.pdfIn PDF document text
    • https://nugaridepi.weebly.com/uploads/1/3/4/4/134474671/totesujisore.pdfIn PDF document text
    • http://egosikenclub.com/53531086549z0xkl.pdfIn PDF document text
    • http://ukranews.site/test_para_la_licencia_de_conducir_en_la_floridazl0xg.pdfIn PDF document text
    • http://midimox.getenjoyment.net/bouddhisme_au_quotidien.pdfIn PDF document text
    • https://sabigojepesadiz.weebly.com/uploads/1/3/2/8/132814096/mopidokesak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463788/normal_5ff7ad288bdb1.pdfIn PDF document text
    • https://vomizovuzib.weebly.com/uploads/1/3/1/6/131637161/nukunasiwef.pdfIn PDF document text
    • https://feposogasutam.weebly.com/uploads/1/3/1/3/131384530/4215044.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jojanotesejivi.epizy.com/performance_evaluation_areas_of_improvement_examples.pdfIn PDF document text
    • http://vikogen.epizy.com/vscode_format_code_css.pdfIn PDF document text
    • http://tubujaj.epizy.com/5792222991.pdfIn PDF document text
    • http://zonidagaxa.epizy.com/17845753679.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED47 3832 bytes
SHA-256: e076dd48d64124af849fa61dfab3dd2895b08c88e1f5bc5482fe133ea3393666
font_01_sfnt_off0000fb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB10 5384 bytes
SHA-256: b9b526bf14319b7a25ce79a58389f0cccf141ee0c7f2342345c19412743a6c60
font_02_sfnt_off00010d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D69 10516 bytes
SHA-256: 2b614eb8ef8c6fd15058fabf8bbf7143f4cba544413cb19c8f843885e699b9ca

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