Malicious PDF — malware analysis report

Static analysis result for SHA-256 d18873a0bd0a3852…

MALICIOUS

PDF

76.5 KB Created: 2021-03-30 01:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 96032d4d1ea1b5936e5a5c34951c96fe SHA-1: deb2005778ba34b59b567b34c8276072fa6c3c05 SHA-256: d18873a0bd0a38520bdc7fe7cc516fdf1db7edbed1930e2c26b0d10675b02bd3
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 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=effective+nuclear+charge+trend+mcat PDF link annotation
    • http://lotibamuzuti.scienceontheweb.net/42385399773.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/scientific_research_project_proposal_example.pdfIn PDF document text
    • http://dimifepovez.22web.org/peganevesalebivufuwewolen.pdfIn PDF document text
    • http://zaxobus.iblogger.org/verbs_worksheet_grade_11.pdfIn PDF document text
    • https://cdn.sqhk.co/pulijidapis/jbH5Ge4/13906047654.pdfIn PDF document text
    • http://rupazaduxil.mywebcommunity.org/action_verbs_exercise.pdfIn PDF document text
    • https://cdn.sqhk.co/nujudemugipi/gjkhaic/beautiful_wallpapers_for_iphone_11.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxukulalodi/jfYidUt/lowakutovatef.pdfIn PDF document text
    • http://xelirap.22web.org/fegodazowifatawagopubopuz.pdfIn PDF document text
    • https://cdn.sqhk.co/zamupefa/hu8ieo8/84955839260.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/38RFijJ/best_online_code_editor_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c2c662fa-00ac-4c69-bf5d-04da7d6c99e2.filesusr.com/ugd/9b33c5_c6946401d08a42d0afe9d55087f2e843.pdf?index=trueIn PDF document text
    • http://bosagiriwamokin.onlinewebshop.net/jatubizopata.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/me_before_you_netflix_usa.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/pufoxuruzakuwolatimike.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/sifizufejo.pdfIn PDF document text
    • http://lelikerakovet.atwebpages.com/alcoholism_and_drug_abuse.pdfIn PDF document text
    • http://suwimifu.rf.gd/37676481079.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/fazebikexafi.pdfIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_314de1dc943143cbbca676ee8d141227.pdf?index=trueIn PDF document text
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_6d9a3def68f24c1c98b9bb4fd723b286.pdf?index=trueIn PDF document text
    • http://tofalit.myartsonline.com/how_to_use_warming_drawer_frigidaire.pdfIn PDF document text
    • https://b5c4f4dd-ae1f-4f6a-908c-f463551224e4.filesusr.com/ugd/dafd60_fe536954daf74d1286914d0e139219e6.pdf?index=trueIn 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_off0000ef3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3E 5276 bytes
SHA-256: 916d199ebc5ae40493873dd2b4bcf7a25c76be1bb16106fd8dd801b97b432f09
font_01_sfnt_off00010113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10113 10360 bytes
SHA-256: 1cdc4fa7dfa99c00e227d6714dab46934dfddb1e681b822f9daf9a9bc2834f3b

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