Malicious PDF — malware analysis report

Static analysis result for SHA-256 947fb81a1669ea97…

MALICIOUS

PDF

81.4 KB Created: 2021-03-30 18:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3b5ce88cfd31eeff6288ef5f00a981cd SHA-1: c0ced68c00fb5a3203c921b412f4aff9ae1ffc5e SHA-256: 947fb81a1669ea973a42635db1c7a6903df3af961ef7d4c09d0fd192c11c9ca1
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/wix?keyword=max+nattapol+diloknawarit+net+worth PDF link annotation
    • https://cdn.sqhk.co/zifiguwosu/xhcjagd/70843475229.pdfIn PDF document text
    • https://cdn.sqhk.co/botonerepap/9AjijhN/cavalleria_rusticana_easter_hymn_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/U1knhey/xatibupisenilimom.pdfIn PDF document text
    • https://cdn.sqhk.co/jomutepe/ahijchb/dish_anywhere_will_not_connect.pdfIn PDF document text
    • http://iqecoportal.ru/ranolurutiwesubi7bjg.pdfIn PDF document text
    • http://tamakedesununod.mywebcommunity.org/gusezamuzelin.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/hhEk3w1/75633777205.pdfIn PDF document text
    • https://wivovisewisapu.weebly.com/uploads/1/3/5/9/135963584/2421681.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/K1ffhbv/lebaran_2019_bulan_apa.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/geWxYjp/40922462960.pdfIn PDF document text
    • https://cdn.sqhk.co/tokafumotebi/xOiaqgi/build_a_bear_baby_yoda_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/Mjcjcgc/kilejipunezetelanaluwes.pdfIn PDF document text
    • https://lefafikof.weebly.com/uploads/1/3/0/9/130969708/nudipisopexosim_kafenenutosogi.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/03_yamaha_kodiak_400_4x4_value.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/t9Dnhjf/mazawikidos.pdfIn PDF document text
    • http://yazansoft.com/i_dont_care_lyrics_justin_bieber_ft_ed_sheeranccptn.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sezebepit/16499781652.pdfIn PDF document text
    • http://polabufu.myartsonline.com/48390622496.pdfIn PDF document text
    • http://nedizilunok.myartsonline.com/arras_del_espiritu_significado_biblico.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/26019756452.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/kakunerosovinefo.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000f401.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF401 10648 bytes
SHA-256: f9b283c5d600976c97756d81e837e4c6e17242934d553622c976519b539ecd6e
font_00_sfnt_off0000e29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29E 5096 bytes
SHA-256: bc5deeac900fa8dc5a7c12a635377fa2f347bbf5468b04ebdbd7ec9818589e4c
font_02_sfnt_off00011229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11229 10864 bytes
SHA-256: ba864d49471c4c41b285c361179ad0fd63952d8501d3dfd75d41e1e1b15516b4