Malicious PDF — malware analysis report

Static analysis result for SHA-256 bafe4f62a67edf44…

MALICIOUS

PDF

89.4 KB Created: 2021-03-06 11:14:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 854811466c3eae0d8c70ea7abee2df54 SHA-1: 5703b4a9413860fc0a9befeeb5881d0e27fc4c1e SHA-256: bafe4f62a67edf44b55f1f0edf26008fb59722b69b44525e982f5f41f02184bc
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm pointing to potentially malicious content. The primary external URI, 'https://mezovuduw.ru/award?keyword=how+to+use+top-o-matic+cigarette+rolling+machine', suggests a lure to a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF structure and heuristics strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities or social engineering to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://mezovuduw.ru/award?keyword=how+to+use+top-o-matic+cigarette+rolling+machine PDF link annotation
    • http://nunokitatamipo.22web.org/bivasagefugevefulu.pdfIn PDF document text
    • http://zokupez.mygamesonline.org/add_monster_manual_1977.pdfIn PDF document text
    • http://kujamemapevubu.mypressonline.com/computer_hardware_components_images.pdfIn PDF document text
    • http://finuxezanasa.mygamesonline.org/the_southern_reach_trilogy_explained.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/58677021479.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/ib_chemistry_lab_report_sample.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/womirofop/15545492106.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/dufevuxisefozijogeredir.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/fitbit_charge_hr_xl_replacement_band.pdfIn PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_8f1010b2cd804075a27e7ed60234165f.pdf?index=trueIn PDF document text
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_5f149fc232c54399be7b0b50c157d416.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zalomi/sensorineural_hearing_loss_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/zegeweparoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/how_do_i_know_what_my_chinese_zodiac_sign_is.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/power_life_protein_powder_reviews.pdfIn PDF document text
    • https://36fc1fe3-b646-4cc1-b6e9-de51469aea27.filesusr.com/ugd/3eb4bd_15c0e982964f4ed980f9285eafa38565.pdf?index=trueIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/what_are_the_requirements_to_join_the_navy.pdfIn PDF document text
    • https://2c5a832e-93c4-4ab0-bef0-969ef348d747.filesusr.com/ugd/cc5daa_5289404acc044ca0bf2874617370db17.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tezude/accuweather_light_java_app.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/luvadejupevuf.pdfIn PDF document text
    • http://mevomum.epizy.com/bakshi_billa_songs.pdfIn PDF document text
    • http://fedonefekipide.myartsonline.com/sort_a_spreadsheet_in_google_docs.pdfIn PDF document text
    • https://84daacc9-7e90-4c5d-b1ed-526950900c49.filesusr.com/ugd/73f3b0_61a067f7c4894e06b94befe68091c0a7.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D1 5432 bytes
SHA-256: b6569e11a6b1e93343f23510f53144583f12bf771362c7b22998e9ce70584181
font_01_sfnt_off0001282d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282D 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off000130bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130BB 11220 bytes
SHA-256: 7a12f63ede49b0a33058a66279ad4b01143df09e7dbf2fba57fd25c4d497eb8b

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