Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc7112f280cbb140…

MALICIOUS

PDF

67.9 KB Created: 2021-03-28 10:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e4fb7755491ce55ffa81724c13271d44 SHA-1: 761f47109e71a6391c196c6c76b3fe0ecbae9766 SHA-256: fc7112f280cbb140634f23edb58c37965c7b8a13875a9778856af3699a495045
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It contains numerous external URIs, including one pointing to 'jottigo.ru', which is likely a malicious redirection service. The document body, though heavily obfuscated, suggests a lure related to an 'Ipod touch 2019 user guide'. No scripts were extracted, but the presence of external links and the overall detection profile strongly suggest an attempt to redirect the user to a compromised or malicious site.

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://jottigo.ru/strik?utm_term=ipod+touch+2019+user+guide PDF link annotation
    • https://cdn.sqhk.co/guzowozuk/I0Rifth/un_copuos_space_debris_mitigation_guidelines.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_6010f93132a7a.pdfIn PDF document text
    • https://cdn.sqhk.co/tidilotofuka/Sgg9Egr/defogari.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/jggihhi/71567242718.pdfIn PDF document text
    • http://vutunema.mypressonline.com/zigugemovamape.pdfIn PDF document text
    • https://cdn.sqhk.co/vefuwebilux/0Lie8ic/nafexepoluxesubomido.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367625/normal_5fe1d6a38e417.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381756/normal_6056094eb6c06.pdfIn PDF document text
    • http://laluwaraselolar.mywebcommunity.org/humayun_ahmed_book.pdfIn PDF document text
    • http://fakurivevid.scienceontheweb.net/alicante_ciudad_mapa.pdfIn PDF document text
    • http://napowojeba.medianewsonline.com/mabovaki.pdfIn PDF document text
    • http://mosomupusafebin.medianewsonline.com/mugazotejufu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tudugir.atwebpages.com/guerilla_marketing_download.pdfIn PDF document text
    • http://wopojofa.atwebpages.com/janejekopap.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/kavafadomiselumagi.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/10909581951.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/canvas_multipurpose_template_free.pdfIn PDF document text
    • http://xekazaz.myartsonline.com/84618718354.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/42700136575.pdfIn PDF document text
    • http://pajupevezujugut.atwebpages.com/lerigawivepi.pdfIn PDF document text
    • http://tixofimisupabev.onlinewebshop.net/hunger_games_books_paperback.pdfIn PDF document text
    • http://wazeniwemir.onlinewebshop.net/annie_s_burger_shack_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/pemumukofo.pdfIn PDF document text
    • http://jonesojawu.myartsonline.com/teaching_english_as_a_second_language_-_perth.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_off0000cd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD42 5512 bytes
SHA-256: fe661aab2779cdf700633fe516a45e63abebcd9b086ee2d77955902ea0edec5a
font_01_sfnt_off0000e005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE005 9876 bytes
SHA-256: 0b7b33c41361303f8a938993cf80ced91eab37a829f028e54190c7451860a82b

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