Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8570c10198673b4…

MALICIOUS

PDF

74.9 KB Created: 2021-03-19 11:09:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 131b25b22314f32c9043f3f844d773db SHA-1: 23ababeda60acf96d88e9d5eea45b13b35fabf39 SHA-256: b8570c10198673b4ae832f500860b2cb9a828b9a047160be5a53548b6b451c9d
126 Risk Score

Malware Insights

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

The PDF file is detected as malicious by ML classifiers and ClamAV, and contains numerous external links, many hosted on disposable domains. The document body, though obfuscated, suggests a lure related to a 'Viper car alarm installation manual'. The presence of external links indicates an attempt to redirect the user to malicious websites, likely for phishing or malware distribution.

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://xajibur.ru/strik?utm_term=viper+car+alarm+installation+manual PDF link annotation
    • https://siganubamisibu.weebly.com/uploads/1/3/4/1/134108806/bawuxuwuzefebusaz.pdfIn PDF document text
    • https://jajajijonox.weebly.com/uploads/1/3/1/4/131453539/82691b1ead1.pdfIn PDF document text
    • http://lutafem.getenjoyment.net/muzopoguku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491936/normal_60275441463da.pdfIn PDF document text
    • http://zosazufinur.mygamesonline.org/44851496496.pdfIn PDF document text
    • https://xutativapejan.weebly.com/uploads/1/3/4/5/134521393/jabolumet_raziwuriluse_lozamu.pdfIn PDF document text
    • https://vaxofawaz.weebly.com/uploads/1/3/2/6/132682661/debagefoguw.pdfIn PDF document text
    • https://cdn.sqhk.co/rifelefiw/djc2ROX/zunawusufibugosoji.pdfIn PDF document text
    • https://cdn.sqhk.co/fijajiles/S8KFKxk/64428949177.pdfIn PDF document text
    • http://tanivikovome.sportsontheweb.net/72714653878.pdfIn PDF document text
    • https://cdn.sqhk.co/moxufupog/mjiXDji/light_balloons_in_sky.pdfIn PDF document text
    • http://gidujoluj.mypressonline.com/basic_pl_sql_tutorial.pdfIn PDF document text
    • https://budamasut.weebly.com/uploads/1/3/4/9/134903336/kusugizuwezam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456660/normal_602d3919adaf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457876/normal_601bdeb85310a.pdfIn PDF document text
    • https://zegilaritapedu.weebly.com/uploads/1/3/1/4/131438092/56240e88.pdfIn PDF document text
    • https://cdn.sqhk.co/ferorigife/3TzgcaU/modern_combat_5_esports_fps_mod_apk_obb.pdfIn PDF document text
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/depikagerokifuzum.pdfIn PDF document text
    • https://totuseki.weebly.com/uploads/1/3/5/3/135322554/927074.pdfIn PDF document text
    • http://ramuwesitavoz.mywebcommunity.org/makkar_reading_book_free_download.pdfIn PDF document text
    • https://wemupubipu.weebly.com/uploads/1/3/5/3/135331653/mekupanofimi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482403/normal_6005435f2d3be.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rizibapuzaduxe.epizy.com/10460685736.pdfIn PDF document text
    • http://nokivegodixisi.rf.gd/bollywood_movies_2017_hd_mp4.pdfIn PDF document text
    • http://jegowijuvu.epizy.com/bill_of_rights_amendments_1-_10.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_off0000e831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE831 5044 bytes
SHA-256: b08d63a2f2730e0b1a92662a3816c1003a46065e5cd297bf3721af07fd25fffd
font_01_sfnt_off0000f946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF946 10252 bytes
SHA-256: 42965e7451f62c57ba9a84f326a2937e5cab1d61c9f95622d2fa77b5f3ce581b

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