Malicious PDF — malware analysis report

Static analysis result for SHA-256 a579f0adf89dfb11…

MALICIOUS

PDF

86.1 KB Created: 2021-04-15 22:46:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: fb32af672ff1efc3edc8b8e861696309 SHA-1: 2d3cf6765e07992e7fe2b8a0044bd20f8e258d73 SHA-256: a579f0adf89dfb1181507cdf9c0cd71185337e012caa107f6637fa00c32fb084
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link leading to a suspicious domain ('gimoguvi.ru') that is likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://gimoguvi.ru/strik?utm_term=lexus+rx+350l+consumer+reviews PDF link annotation
    • http://betmoy57.com/18881711469no7ij.pdfIn PDF document text
    • https://vukedezesul.weebly.com/uploads/1/3/0/7/130776134/buvevetolelenufoxe.pdfIn PDF document text
    • http://leree4.club/kofefozudunasl3404.pdfIn PDF document text
    • http://vizazovabula.mywebcommunity.org/articulatory_phonetics.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/28460185810.pdfIn PDF document text
    • https://sedezexe.weebly.com/uploads/1/3/4/3/134342112/venusilubijulirejul.pdfIn PDF document text
    • http://ehaberdevlet.com/550039891765xmd2.pdfIn PDF document text
    • https://rirulejirosajis.weebly.com/uploads/1/3/4/3/134320684/44c0ddcd9ab8f.pdfIn PDF document text
    • http://pornbustyvids.com/is_the_canon_powershot_sx540_a_good_camera_for_youtubedeztj.pdfIn PDF document text
    • http://instapriz365.online/78670492400cpona.pdfIn PDF document text
    • https://giliruba.weebly.com/uploads/1/3/1/4/131483170/cb3a5ac9b.pdfIn PDF document text
    • https://jonenatone.weebly.com/uploads/1/3/1/8/131872225/a6e342abb3d565c.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://s3.amazonaws.com/fuwenoxuzasila/5._why_is_ibn_battutas_hajj_important.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/getunaxetifazizamizedusel.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/biochemistry_of_life_s_macromolecules_lab_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/incredible_adventures_of_van_helsing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/17939615318.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/messenger_old_version_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/mafixiramutoxajatujuwalag.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/70701427447.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_off00010630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10630 5128 bytes
SHA-256: f8ab1ac25e36bf5478a4f441391aff4e63ba76a95224303d6f52c576251ba28d
font_01_sfnt_off0001178e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178E 11100 bytes
SHA-256: 84cbf24fd715b99770f265f5f2497dade1ca6200ef224279e4b52267795c3199
font_02_sfnt_off00013d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D4C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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