Malicious PDF — malware analysis report

Static analysis result for SHA-256 589694ee934d74d7…

MALICIOUS

PDF

85.4 KB Created: 2021-04-06 17:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 92608b68921f8155e0878fccc226c661 SHA-1: 53e3a7ee7584347f11a8c7e16fafb36192527b51 SHA-256: 589694ee934d74d777aeeed4c73093726b4da6a4140635d8d0c922e6679775ba
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jumiwimov.ru/strik?utm_term=g+shock+casio+wr20bar+gold+price PDF link annotation
    • http://figuxovutofid.mygamesonline.org/sefunirubemigopas.pdfIn PDF document text
    • http://testersairf.xyz/what_are_the_best_exercises_for_basketball_players6slvd.pdfIn PDF document text
    • https://navojinalano.weebly.com/uploads/1/3/4/7/134755450/bisebanidor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458621/normal_6011f0f87f570.pdfIn PDF document text
    • http://wbigs.space/tefedoxokuzowamujorubarun2lkr.pdfIn PDF document text
    • https://zojovotonoturur.weebly.com/uploads/1/3/5/3/135348007/ripoteve_zukajajid.pdfIn PDF document text
    • http://mizizufiku.mywebcommunity.org/jotanizivikuzoxesifukifu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450727/normal_605325f79f416.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481673/normal_60316ad40fed3.pdfIn PDF document text
    • https://gazobibulome.weebly.com/uploads/1/3/4/7/134775133/guribafuzasene.pdfIn PDF document text
    • https://jifosibupegexuv.weebly.com/uploads/1/3/4/6/134692258/tufonav.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/ijbMww1/34739524208.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/99785591188.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371005/normal_5fc99342a78d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446017/normal_5fcf430249d1a.pdfIn PDF document text
    • https://dosupara.weebly.com/uploads/1/3/1/3/131380612/faziboferugenumefupe.pdfIn PDF document text
    • https://cdn.sqhk.co/janezewufaj/gfhgdmk/54116956964.pdfIn PDF document text
    • http://puvinizozibejir.mygamesonline.org/buenos_habitos_alimenticios_para_nios.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://uploads.strikinglycdn.com/files/d4925c59-448c-4329-8773-32105b35a89f/fipumodebin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ba9f40a-d5dc-4847-b090-3015f0ff86d7/43116174094.pdfIn PDF document text
    • http://lupixopuvir.onlinewebshop.net/tawagefirizokafaxipeserez.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_off000100b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B5 5540 bytes
SHA-256: 4675bde654728efce625b5c445ce0ffbd65b22637193bc7761597671867f9887
font_01_sfnt_off0001139d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139D 10764 bytes
SHA-256: 77e023c8021107f3c777fbd24157c316a11c727fe83877ec0d598e848002aa87
font_02_sfnt_off00013820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13820 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34