Malicious PDF — malware analysis report

Static analysis result for SHA-256 91724fc0f6c293c8…

MALICIOUS

PDF

71.5 KB Created: 2021-06-05 20:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0a140238db62c9baa28fcaae00deae48 SHA-1: cb738a68cf6990985d4e0aff5fe233f82ece61e9 SHA-256: 91724fc0f6c293c8920739fb404e721ea6e2587d463bcceefc4c117fe5238310
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs, many pointing to link farms on disposable hosting, suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to product names and application details, likely serving as a lure to encourage interaction with the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nomylo.ru/pbw?utm_term=samsung+galaxy+tablet+e+9.6+cover PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duziruromeja.pbworks.com/w/file/fetch/144495966/add_metaball_to_mesh_blender.pdfIn PDF document text
    • http://savavaze.pbworks.com/w/file/fetch/144476079/mutants_genetic_gladiators_breeding_guide_with_pictures.pdfIn PDF document text
    • http://zuvuzut.pbworks.com/w/file/fetch/144548067/can_you_make_an_appointment_with_lyft.pdfIn PDF document text
    • http://demopefo.pbworks.com/w/file/fetch/144528780/wegowabup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53eacb35-9f92-4429-a180-4f929b9d37eb/rerewosa.pdfIn PDF document text
    • http://lesokulovisu.pbworks.com/w/file/fetch/144625839/kusuponebaxalubipuvop.pdfIn PDF document text
    • http://vamafob.pbworks.com/w/file/fetch/144647853/cmle_dzeyinde_anlatm_bozukluklar_km_sorular.pdfIn PDF document text
    • http://mefijunov.pbworks.com/f/bodozaxod.pdfIn PDF document text
    • http://zajozote.pbworks.com/f/38497933804.pdfIn PDF document text
    • http://bojirakaj.pbworks.com/f/evermore_beauty_and_the_beast_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a04b69e-cf95-48ef-b760-1e5d3c2dee9c/mutumuviwofugumumakop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52eda167-3d56-469b-addd-b36f3ef237e9/what_is_the_home_of_the_greek_gods_called.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/644b27d6-318c-466c-906b-453e43cd23ce/13206708696.pdfIn PDF document text
    • http://vogituvu.pbworks.com/w/file/fetch/144507777/sony_vegas_11_64_bit_crack_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f2fd97d-58c9-4c09-8598-8b098f5952bc/regular_and_irregular_verbs_exercises_with_answers.pdfIn PDF document text
    • http://naxoxututal.pbworks.com/w/file/fetch/144452397/52082330839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dff3c2e-6b2a-4289-95f3-7291a28115fd/name_meaning_in_urdu_girl_laiba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7a01c80-fcd2-4cc2-bae7-98794b9b1ca6/what_is_the_hardest_question_you_have_to_answer.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_off0000d5c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C2 5936 bytes
SHA-256: dbe3cb99c9af18e8eaa526f43ad8ee603e54ef915f8f1adc1634ee26b87c6bb4
font_01_sfnt_off0000e9ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9ED 11004 bytes
SHA-256: 6829c3ccc2c2ec7c7ad6d67625d505fb85b6055a149d47771c9960fc0f338208

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