Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7f97a82b9bb2684…

MALICIOUS

PDF

78.4 KB Created: 2021-04-01 03:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 94d6b367b9107e477095cd6ca1c568f4 SHA-1: d01f6292f886d325ddd44f86ea4bbdc7f8c25872 SHA-256: a7f97a82b9bb26846582d0ad4bc089910dfbe7e9f44a4145b2c9be89b5804d44
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains numerous embedded URLs, many of which point to disposable hosting and are designed to redirect users, suggesting a link farm or phishing lure. The presence of external URIs and the ML_NYX_PDF_MALICIOUS heuristic strongly support a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/strik?utm_term=a+full+mental+status+examination+sample PDF link annotation
    • http://kijekidajefi.getenjoyment.net/nios_assignment_format.pdfIn PDF document text
    • https://cdn.sqhk.co/gojapawareke/ggYYdLE/sapugejunolavemoxoraduten.pdfIn PDF document text
    • https://cdn.sqhk.co/bemoranoz/heVjihb/revolico_la_habana_mayo_2020.pdfIn PDF document text
    • https://lifunakejeka.weebly.com/uploads/1/3/4/3/134358873/144f36cd5e4905.pdfIn PDF document text
    • http://reabook.online/lonely_shepherd_sheet_music_flute173o8.pdfIn PDF document text
    • http://freud.icu/why_was_the_roomba_980_discontinuedo02hp.pdfIn PDF document text
    • http://niwopofe.scienceontheweb.net/kamus_bergambar_arab_indonesia.pdfIn PDF document text
    • https://foxenaduro.weebly.com/uploads/1/3/1/1/131164157/jetew_dojarusuraxatin_wajofagalilidat.pdfIn PDF document text
    • http://supermagazforsale1.xyz/puzafapazusanakuwo39g2n.pdfIn PDF document text
    • https://nonesuwenuvav.weebly.com/uploads/1/3/4/4/134400251/3175734.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/D37lggL/break_the_glass_ceiling_meaning.pdfIn PDF document text
    • http://govovimifakine.mywebcommunity.org/amor_de_invierno_jazmin_riera.pdfIn PDF document text
    • https://nilukosezaxed.weebly.com/uploads/1/3/0/8/130814529/7424762.pdfIn PDF document text
    • https://konimekinera.weebly.com/uploads/1/3/4/4/134444166/mozetajujubad_dojogovalonomir_rebejalit_soverutulogoxe.pdfIn PDF document text
    • http://wuxixezigitezir.mygamesonline.org/gegaguxere.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://batijobiso.epizy.com/kejur.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/bhootni_ke_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/dewevutofabituvanex.pdfIn PDF document text
    • http://bixikaw.epizy.com/oh_lord_how_excellent_sheet_music.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/13771580822.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/2003_nissan_350z_auto_vs_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/difference_between_ethics_morals_and_values.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_off0000f568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF568 5008 bytes
SHA-256: 6ba075213f560f491f335b1eccd41acfa2eea69558ba4de17f714b512ef4a22e
font_01_sfnt_off00010666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10666 11136 bytes
SHA-256: 8987a2daa34c909843c53113d37e2e55ec6650bc483ab6cea40228ce8417c617

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