Malicious PDF — malware analysis report

Static analysis result for SHA-256 48bf27b061dc5d4a…

MALICIOUS

PDF

84.9 KB Created: 2021-03-19 16:33:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce47d5f25aae07a884a20e93cb1e79e6 SHA-1: 4f1a7634b5fa820d618ff7beb565988a8e2b30b7 SHA-256: 48bf27b061dc5d4ab7b4e99a32c0d8e1ebda273a76ee868fe287573783e15e4f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, which is a common technique for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external links suggests the document is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/aws?utm_term=master+of+the+universe+fanfiction
    • https://tifowufiwadoxi.weebly.com/uploads/1/3/4/0/134098290/kebaluwoduvomafoni.pdf
    • https://cdn-cms.f-static.net/uploads/4454040/normal_5fd38f3c73edc.pdf
    • https://static.s123-cdn-static.com/uploads/4417220/normal_5fe2450f3db92.pdf
    • https://static.s123-cdn-static.com/uploads/4475212/normal_5fe29fda595dd.pdf
    • https://webexozaputer.weebly.com/uploads/1/3/2/6/132681415/cd8a36e889bdbf.pdf
    • http://wunawuwome.22web.org/55613153405.pdf
    • https://static.s123-cdn-static.com/uploads/4371010/normal_60076f094911f.pdf
    • https://zunimivivonuz.weebly.com/uploads/1/3/4/0/134017399/refojezibe.pdf
    • https://wuxivebumuvarog.weebly.com/uploads/1/3/1/0/131070366/1336431.pdf
    • https://bopunesarikimar.weebly.com/uploads/1/3/1/4/131453984/vuguwet-sunenetovibeg-rinos-jasudawojif.pdf
    • https://wexapifunoru.weebly.com/uploads/1/3/4/7/134715363/45385.pdf
    • http://funusiwevig.22web.org/bavetunifowofematetajemu.pdf
    • https://buzapakamewogu.weebly.com/uploads/1/3/4/3/134366326/4679492.pdf
    • https://romiwewigases.weebly.com/uploads/1/3/2/6/132682929/3012050.pdf
    • https://zepagowixo.weebly.com/uploads/1/3/4/8/134887299/6527369.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a3720f92-bdaa-4449-a3ff-14f36884d2d5.filesusr.com/ugd/afadc3_455e9e54ed454d65a2ae74f3d706f214.pdf?index=true
    • https://238a82c5-85a8-4641-a991-2f0f5270ddc4.filesusr.com/ugd/63f22d_fba6baf6ba5343ebbb2da67ad419895e.pdf?index=true
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_759b6beb0c9f46ce8c817910a688d684.pdf?index=true
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_9271b4ef04024b9c93a5af3f572a744c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2c100dd9-082c-426e-afb6-499a1e51540b/super_smash_bros_ultimate_easy_piano_sheet_music.pdf
    • http://xodupope.epizy.com/cambio_climatico_2017.pdf
    • https://9f349447-249b-4747-956a-316fe86e371b.filesusr.com/ugd/d2b720_aecb338ef49443baa31b35ee86e1d8f1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8c27d8fc-fe7c-4eb9-9d76-1657c800017c/zinunebirizodep.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6ef.bin
1974ac8926e65d6e183e5020972429b91f63926b5689c76552746b6c010764af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EF 5000 bytes
font_01_sfnt_off00010805.bin
26467f0e3be76da756b05ce3f5512f1cbc8363b24556037c1ce166c9493dccd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10805 12004 bytes
font_02_sfnt_off00013099.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13099 16204 bytes

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