Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fbf3d700ed05e9b…

MALICIOUS

PDF

94.4 KB Created: 2021-03-24 19:16:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 73b798a04e9311331058373a22c541c1 SHA-1: bf187e847dd0cd1c66e3c389b7b5f24009a81cb5 SHA-256: 4fbf3d700ed05e9bf7711777981b5a85dad29cf16802dc213fabfd5128806585
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF link farm' pointing to external PDFs. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/123?utm_term=crosman+m1+carbine+bb+gun+manual PDF link annotation
    • http://wukosuwusa.iblogger.org/tutupafulozisozane.pdfIn PDF document text
    • http://mufosozewolofar.iblogger.org/what_are_the_classification_of_living_organism.pdfIn PDF document text
    • http://ruwosiju.getenjoyment.net/zuperolozu.pdfIn PDF document text
    • http://vixabaj.scienceontheweb.net/caryll_houselander.pdfIn PDF document text
    • http://sufofure.mywebcommunity.org/48787123336.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_a475e7a9a9ea4b6aa8f8db29038fa281.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/irene_adler_theme_violin_sheet_music.pdfIn PDF document text
    • http://pilejifizodan.onlinewebshop.net/piweteziguxuxowixap.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/36082710958.pdfIn PDF document text
    • https://5090cb7a-f7dd-45b7-a4a3-960150b62b23.filesusr.com/ugd/dfd4af_376ec05feb8744689cfb7ae1fb0a9232.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lanubili/hypertensive_crisis_guidelines_2015.pdfIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_46edabe41fa945668e3297a5b484bfac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/safago/ben_10_heroes_mod.pdfIn PDF document text
    • http://tutanimonuwodam.epizy.com/what_is_sport_mode_on_toyota_camry.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/rakazaxexe.pdfIn PDF document text
    • http://texazelezawo.rf.gd/21263690970.pdfIn PDF document text
    • http://gamelaluwer.myartsonline.com/65299511031.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/bootstrap_moving_box_carousel_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/10_maths_half_yearly_answer_key_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/all_american_trash_brockhampton.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/carotida_interna_ramas.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/nhtsa_sfst_student_manual_2018.pdfIn PDF document text
    • https://5a6df620-610b-4d6f-8f1b-71e936bb70bc.filesusr.com/ugd/1f5cef_61ebd760aeeb41d1b51de6836c81beaa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/manual_de_pointer_wagon_2000.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/docker_for_windows_7.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000123f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F6 5136 bytes
SHA-256: 1566b0418601bd19a6213fbfae3bf7aa1184bae858698962f78ec41f1d014ce9
font_01_sfnt_off00013550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13550 11948 bytes
SHA-256: 42c6319f94f50e27db8074e4266fd8af4253188ad48a45ee9ee005e5b74b5c26
font_02_sfnt_off00015df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DF6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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