Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df605bc31e32e90…

MALICIOUS

PDF

61.6 KB Created: 2021-02-18 20:42:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 69d90ce77391d4330f3ff9bf346cfee9 SHA-1: a8cd0e1032bec5c8116357ac6e4d0d369924acdb SHA-256: 3df605bc31e32e902f7b61b4207e74f9c9e9695c4f808af99adb5ea5648560ad
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of techniques used to deliver malicious payloads or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/aws?utm_term=nys+dmv+cdl+permit+test+appointment PDF link annotation
    • http://hopecommunitynaz.com/chamak_challo_chel_chabeli_full_song2jjtw.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/jodozeg.pdfIn PDF document text
    • https://wanovupejofo.weebly.com/uploads/1/3/4/5/134580977/nakimefane_vagifewipat_pibageb.pdfIn PDF document text
    • http://brandframeb.com/foxosudegifituretomertp4r.pdfIn PDF document text
    • https://texoxarisozitew.weebly.com/uploads/1/3/0/9/130969357/zadipuborizu-jikotanug.pdfIn PDF document text
    • https://kadibunafi.weebly.com/uploads/1/3/0/9/130969561/7831039.pdfIn PDF document text
    • http://ridiriwefu.iblogger.org/40368205590.pdfIn PDF document text
    • https://pakotoroxup.weebly.com/uploads/1/3/0/8/130815058/7594777.pdfIn PDF document text
    • http://bestita.space/180120631557sk8y.pdfIn PDF document text
    • https://dazifefizax.weebly.com/uploads/1/3/4/8/134854215/zuwepabon.pdfIn PDF document text
    • https://popogupu.weebly.com/uploads/1/3/1/3/131398113/xapamevebute-varovovomasawi-muvemupav.pdfIn PDF document text
    • https://mupasifuv.weebly.com/uploads/1/3/2/6/132680827/jumugowalidazot.pdfIn PDF document text
    • https://tedogiji.weebly.com/uploads/1/3/0/7/130775371/18bd5f8ec.pdfIn PDF document text
    • https://migawonakizize.weebly.com/uploads/1/3/1/6/131637147/kuzarifarovulosebeb.pdfIn PDF document text
    • http://nickned.me/potufadosafajemubjvicl.pdfIn PDF document text
    • https://remofixar.weebly.com/uploads/1/3/0/7/130776049/nebuginajaxitu.pdfIn PDF document text
    • https://zunejekuriraruk.weebly.com/uploads/1/3/2/7/132712234/votunusesogulodar.pdfIn PDF document text
    • http://ruwazelenefago.22web.org/wrong_turn_6_movie_mp4moviez.pdfIn PDF document text
    • https://serogewuf.weebly.com/uploads/1/3/4/6/134615077/1681777.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dewelimu.epizy.com/android_app_review_new.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_off0000b59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB59D 5352 bytes
SHA-256: 9f1e6be34ab2162817080c2c9c7532cecc2c3d06a00dcb451aa7d38dce30a396
font_01_sfnt_off0000c7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7CC 9748 bytes
SHA-256: c179d562077e45e352910fc7e7c1226e9f473a3c8e203c98de66c205a90dd189

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