Malicious PDF — malware analysis report

Static analysis result for SHA-256 397558523eb2265d…

MALICIOUS

PDF

73.0 KB Created: 2021-03-25 14:53:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d11cf24fffdc7813f87501468f313782 SHA-1: c4bec4fb6f8e202315f53bdb85803a0a0a62fdfb SHA-256: 397558523eb2265df67dec68c045dc001b9a0975b3e7a24cba4da4f99a186ef7
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically related to phishing. While no scripts were directly extracted, the structure and heuristics point towards a malicious PDF designed to host or link to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://jumiwimov.ru/wix?keyword=drinkwell+platinum+manual
    • http://vukufitu.mywebcommunity.org/5774754155.pdf
    • https://cdn.sqhk.co/tabewinudeka/ggguid2/pewabiramubosekubab.pdf
    • https://cdn.sqhk.co/bavisimupux/iWjcgdZ/toxebefubibupuvilopunopu.pdf
    • http://lukunezevowazol.sportsontheweb.net/fundamentals_of_heterocyclic_chemistry.pdf
    • https://cdn.sqhk.co/vowibesep/HAhejhY/lyrical_video_status_maker_lyrical_photo_video_apk.pdf
    • https://fukuzodi.weebly.com/uploads/1/3/5/3/135329923/ribekipum.pdf
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/2126058.pdf
    • https://gogovujogizog.weebly.com/uploads/1/3/1/6/131607278/tibamekitij_milezifuz.pdf
    • https://cdn.sqhk.co/molivovuki/gjha6hJ/leninakekodi.pdf
    • https://guzovadolo.weebly.com/uploads/1/3/1/6/131606502/mokule.pdf
    • http://vizilirudigub.getenjoyment.net/21509102998.pdf
    • http://jekeluxuto.mywebcommunity.org/96967373640.pdf
    • https://gokasesebigi.weebly.com/uploads/1/3/3/9/133986942/zipokodut.pdf
    • https://cdn-cms.f-static.net/uploads/4372753/normal_605078cde71f3.pdf
    • https://cdn-cms.f-static.net/uploads/4463306/normal_6052a62323e85.pdf
    • http://novofikupeneda.mywebcommunity.org/40633128197.pdf
    • https://cdn.sqhk.co/tanusulirava/fHm33Uf/borelusitesotubifitelalo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tiwosutodegadax.onlinewebshop.net/69230347320.pdf
    • http://vipuzala.myartsonline.com/36661244707.pdf
    • https://40e214c1-1950-44e8-a195-e2c6eeb23253.filesusr.com/ugd/a517f4_7d4476f1529144faab016f9741dc0c75.pdf?index=true
    • http://piwakitidi.onlinewebshop.net/virusowogojuzulejo.pdf
    • http://nerezusilanake.atwebpages.com/blue_jackets_jersey_numbers.pdf
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_96a8b14a3635430382a3f717aae7909d.pdf?index=true
    • https://fd7a53fe-11c1-4e60-83ad-ac1bb997268f.filesusr.com/ugd/5cf23b_571843266f594c73b46621ad9de68902.pdf?index=true
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_051212c9b424421499142ca155a96171.pdf?index=true
    • https://40e214c1-1950-44e8-a195-e2c6eeb23253.filesusr.com/ugd/a517f4_55f5bb369d59428c826ec91d4f7998e9.pdf?index=true
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1cc.bin
82aed5675c3a71468fdf844b19a19c0a454cbd5c14e8270430d767ecce1052f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CC 4176 bytes
font_01_sfnt_off0000e0bd.bin
a74beb3d9be6a38b762fcfd5b493cfe7da94d4ecad687e864846b6a0ce41db0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BD 4940 bytes
font_02_sfnt_off0000f18d.bin
e8d34195e110ba00707df3b6147d009c9d33e33f232dc471370dfdb489167553		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF18D 11032 bytes

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