Malicious PDF — malware analysis report

Static analysis result for SHA-256 091763f6240568fa…

MALICIOUS

PDF

80.5 KB Created: 2021-03-24 21:56:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a3207cc44df72693c1525844fc6c770f SHA-1: 41d2ab894ca425a0944cd3f832a97eb9e51c1d27 SHA-256: 091763f6240568fa31edc6cbf66d42e74d9bbcf425824df1223c726045e9c993
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://nipisod.ru/wix?keyword=elixir+storage%252Fbuilder+base PDF link annotation
    • http://pubgucbayim.com/mutuwexiwosizolatavogtzru.pdfIn PDF document text
    • http://itdiscount.pro/zudabr9pqu.pdfIn PDF document text
    • http://valuburikodajad.medianewsonline.com/wutubuvorabijozesogubibum.pdfIn PDF document text
    • http://gibelineg.sportsontheweb.net/oracion_de_la_maana_para_recibir_al_espiritu_santo_de_dios.pdfIn PDF document text
    • https://cdn.sqhk.co/piwizogir/jahfhbe/tezuvefelo.pdfIn PDF document text
    • http://vseti.life/45684607961wpfn2.pdfIn PDF document text
    • https://cdn.sqhk.co/dipasupor/bnihjir/todafenejizumugovumil.pdfIn PDF document text
    • http://thecabinets.xyz/american_government_brief_14th_edition0h4pj.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/76996814578.pdfIn PDF document text
    • http://greatholl.com/55124730994iwk5m.pdfIn PDF document text
    • http://helplnstagram-confirm.com/what_organizations_will_take_furniture_donations8zr8y.pdfIn PDF document text
    • http://barcaporirternet-interbank-pe.com/what_is_the_role_of_ieee_in_computer_networkinghgboq.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/fjbhghh/disney_apple_tv_atmos.pdfIn PDF document text
    • https://cdn.sqhk.co/tidelefuzin/hgiGjj7/64334174629.pdfIn PDF document text
    • https://cdn.sqhk.co/mewuxedodi/ji7hhZF/insideout_coaching_grow_model.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_ac4fdfc0d43e4d579a3bb80817b3ad51.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5272e0c-1c0b-44b8-9159-a6c5e040a1be/fizanuxogumoro.pdfIn PDF document text
    • http://zimopup.myartsonline.com/funejarapufalokir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e079f98-b413-41e4-997f-79f3e8a1ab17/bonujaduxezuxulukuzebim.pdfIn PDF document text
    • https://51fa5ab5-1254-4b81-b04c-93bf5fb5640a.filesusr.com/ugd/a58502_284f7915c1ce46cfb90f5a3228d10615.pdf?index=trueIn PDF document text
    • https://47e244ab-6b1f-4ae7-97e8-86de5b619f9f.filesusr.com/ugd/e1d12c_a1e7aa73bf32432789ad5a053c31e7c2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9766088a-2920-47c9-a1a0-8e87f84cdb32/pogofejelon.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_off0000f136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF136 4968 bytes
SHA-256: f57e2efa84b69cd402ceb6fe6b3aca816b6cec800faa2ed40497e115012d71f2
font_01_sfnt_off00010234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10234 10672 bytes
SHA-256: 3850247c8f4904920b9087c9c94f92d978a73df18d534d7ac42b5754910dc17e
font_02_sfnt_off0001268f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1268F 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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