Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a1596e20904bd17…

MALICIOUS

PDF

83.3 KB Created: 2021-03-20 14:48:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4314c21c2dc809a6c01ff32c2a9009a5 SHA-1: 948065a0b0c50ad312e41ab8a383d75530d52f6f SHA-256: 6a1596e20904bd177056b1d62df69df3c2ba93e1dcdc94cd3ea65e061ca6a4c3
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 0.9997

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/award?keyword=candlestick+reversal+patterns+pdf PDF link annotation
    • http://gilumesu.mypressonline.com/lowiwofo.pdfIn PDF document text
    • http://bapadama.medianewsonline.com/quantitative_aptitude_tricks_and_tips.pdfIn PDF document text
    • http://mukinumatonewo.getenjoyment.net/where_is_the_setting_of_the_story_pandoras_box.pdfIn PDF document text
    • http://sogejovep.mypressonline.com/vomopogixinagobojali.pdfIn PDF document text
    • http://xamojopilupivo.scienceontheweb.net/bronchiolite_virale_chez_nourrisson.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/washington_state_covid_vaccine_news.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kulebosux.myartsonline.com/mavuvizukevisigux.pdfIn PDF document text
    • http://wadoromutisagar.myartsonline.com/78912056624.pdfIn PDF document text
    • https://c07b3cb0-7d4a-4e65-9c62-eb3bd0ce3b6b.filesusr.com/ugd/7560d5_8e247fb5101845f392781cba5a474389.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/vaya_con_dios_what_a_woman_lyrics_youtube.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/lagilo.pdfIn PDF document text
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_ef9d23be0df84e0796f2d3eee33e999e.pdf?index=trueIn PDF document text
    • http://ralirajuz.atwebpages.com/what_is_data_management_skills.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/xapokaja.pdfIn PDF document text
    • http://bebojivim.myartsonline.com/oscar_award_2020.pdfIn PDF document text
    • http://pedamodaw.onlinewebshop.net/93823134468.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/73261558008.pdfIn PDF document text
    • http://taguloxutenafol.myartsonline.com/difficult_english_words_with_meaning.pdfIn PDF document text
    • http://wozitoso.atwebpages.com/babitidode.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/47426979680.pdfIn PDF document text
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_75a1a5ff74254be6a07fb06fc9b8cea2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zizene/15356290033.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_off0001099f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099F 5176 bytes
SHA-256: d5a5c6e1af5f8ade860150f37df53b1b41a57694c9f1111d1478625eb5e0a14f
font_01_sfnt_off00011b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B52 10652 bytes
SHA-256: 39028707ab37d00cf026c7ed6260c01a0e605905ce2d13a254826bea76c80498

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