Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c1b5b720ed8b97…

MALICIOUS

PDF

69.9 KB Created: 2021-03-05 16:07:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 71ba75c06b1c914b284c0c147128e9c0 SHA-1: 61155bbab737ce6f0dd9efaeb3d58b94914c4c31 SHA-256: 58c1b5b720ed8b97d35ba5a42e5ef5fe7b7ba28381247181b70aa29dd28d38bb
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable hosting and exhibiting link farm characteristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/wix?keyword=greatest+discoveries+with+bill+nye+genetics+video PDF link annotation
    • https://xoxawipexari.weebly.com/uploads/1/3/0/7/130775732/aecfa50ef1db6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416934/normal_603fb65e59dbf.pdfIn PDF document text
    • https://cdn.sqhk.co/metusoteliza/fhbgGgc/10178277944.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448339/normal_5fdfdae1e6bcd.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/ghRjgjc/74490848835.pdfIn PDF document text
    • https://cdn.sqhk.co/vizoxaxijojo/DgjWnZU/domino_s_pizza_w._republic_rd.pdfIn PDF document text
    • https://wibujiwegawej.weebly.com/uploads/1/3/4/8/134899761/nefajageve-ratuzaposub-mapitipitupel.pdfIn PDF document text
    • https://zovakilezogavi.weebly.com/uploads/1/3/1/1/131163957/kufasotulemuden.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425533/normal_603246e5b471c.pdfIn PDF document text
    • https://gupebaxederor.weebly.com/uploads/1/3/4/6/134691072/4191707.pdfIn PDF document text
    • https://cdn.sqhk.co/jepipovi/R5qiagj/original_vintage_motor_racing_posters.pdfIn PDF document text
    • https://cdn.sqhk.co/lixozimiz/3DhiO0W/define_handbook_synonym.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452861/normal_5fd9927c3464c.pdfIn PDF document text
    • https://jusopusoguwukul.weebly.com/uploads/1/3/4/4/134494455/3873431.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489411/normal_5ffa865faf3eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/antivirus_app_android_example.pdfIn PDF document text
    • http://kazixovo.rf.gd/sitab.pdfIn PDF document text
    • http://tofarogupa.rf.gd/jelomolalif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0faa3ed2-1087-4afa-8023-398fba74a8e8/67515341575.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf21d368-a28a-49d8-994c-5079bdf3fed4/53719066118.pdfIn PDF document text
    • http://lomonogugala.epizy.com/66211584077.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/34734266829.pdfIn PDF document text
    • http://perowal.rf.gd/sad_song_status_video.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/88804713508.pdfIn PDF document text
    • http://tidinofo.epizy.com/5th_grade_math_worksheets_multiplication.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_off0000d411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD411 5628 bytes
SHA-256: 566c3f87df3f06c0f93c9c29cd5638d88ced0e453c6f5d1923d0bf0d8dffe160
font_01_sfnt_off0000e743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE743 10044 bytes
SHA-256: 6b42fa3d89ca6cdf5d032d06229eeb7b23eeda69b24cc5ef926a2d85f57053ce

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