Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c90098419a723a…

MALICIOUS

PDF

74.0 KB Created: 2021-02-20 09:52:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2003591c5a42dab3939b2ac46a42fc2f SHA-1: bc91762335b354b6229a83e622ae16ddbce03cc7 SHA-256: 56c90098419a723a8a94692e76f225654c029b1752d76c25f22ea93433ca2847
136 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The embedded URL and document body suggest a lure related to downloading a manual, which is a common phishing tactic. While no scripts were explicitly extracted, the PDF structure and external URI firings point towards a malicious document designed to trick users into clicking on a link that likely leads to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/wix?keyword=factorytalk+transaction+manager+manual+espa%25C3%25B1ol PDF link annotation
    • http://peskomment.ru/microsoft_excel_2013_practice_exercises7wpjj.pdfIn PDF document text
    • http://lianhua.life/lista_de_adjetivos_comparativos_e_superlativos_em_inglesymcel.pdfIn PDF document text
    • http://hookup153.space/blue_letter_bible_acts_5_study_guide2li4x.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/j1mSQeF/ripujidefojopomabi.pdfIn PDF document text
    • https://cdn.sqhk.co/midijanere/gjNhhOz/40052337859.pdfIn PDF document text
    • https://cdn.sqhk.co/rutunidosaw/3ibMj8K/sculpt_it_fitness_hickory_nc.pdfIn PDF document text
    • https://cdn.sqhk.co/pavoraxebute/jek9hh4/xajopurolezojigago.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dixaleko/29420626130.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/37708545211.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/tv_guide_sunshine_coast_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/chicago_style_manual_oxford_comma.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/chemical_bonds_ionic_and_covalent_quiz_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/82898774738.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/f5_vmware_view_deployment_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/arkham_asylum_a_serious_house_on_serious_earth_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/biology_trivia_questions_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/old_parchment_powerpoint_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/bioshock_2_protector_trials_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/807630228.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27C 5584 bytes
SHA-256: 1b230d6ead7e766663aea47f6196cb6ce85c9668e3535ccffd890bceca396db2
font_01_sfnt_off0000f539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF539 10300 bytes
SHA-256: 71ebeb968f29d7934a6295e70e75a99ac451a9e7e12d7be0053f5ae94520f074

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