Malicious PDF — malware analysis report

Static analysis result for SHA-256 613268977910ea8c…

MALICIOUS

PDF

81.2 KB Created: 2021-06-05 06:09:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9ee876cb4a026ecd2693b8e4fe9a7f58 SHA-1: 925fe49fbd986fc867675b9aa9d6eb8070962112 SHA-256: 613268977910ea8ce2e939bb7e7761aed007a2e5f90dd5020f7a32fd6d8e9d0a
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that leads to a link farm, a common tactic for phishing or distributing further malware. The document body, though heavily obfuscated, contains text related to 'verizon customer service phone number', suggesting a pretext for the malicious link. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://chcial.ru/pbw?utm_term=how+do+i+get+a+human+at+verizon+customer+service+phone+number PDF link annotation
    • https://mipixapotorifa.weebly.com/uploads/1/3/0/9/130969355/danekifixifameruzo.pdfIn PDF document text
    • https://nagejezesalu.weebly.com/uploads/1/3/0/8/130874580/d8c30f23f.pdfIn PDF document text
    • https://lonupuvajofova.weebly.com/uploads/1/3/4/3/134341927/digulatetuwum_dalavewuxet.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
    • http://difusowafid.pbworks.com/w/file/fetch/144640734/tuxuzizixijibalel.pdfIn PDF document text
    • http://gemometis.pbworks.com/w/file/fetch/144568629/72801396194.pdfIn PDF document text
    • http://wotetidi.pbworks.com/w/file/fetch/144636270/2223330405.pdfIn PDF document text
    • http://joxupakager.pbworks.com/w/file/fetch/144497004/blender_character_modeling_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6449944b-7817-43fe-9915-5cfc5cc8da33/what_is_a_caliper_measuring_tool.pdfIn PDF document text
    • http://zosajivapesi.pbworks.com/w/file/fetch/144644385/39387945846.pdfIn PDF document text
    • http://juvudibip.pbworks.com/w/file/fetch/144573483/38745580908.pdfIn PDF document text
    • http://lopofemusun.pbworks.com/w/file/fetch/144497511/rujigarijafajipun.pdfIn PDF document text
    • http://xuresasadox.pbworks.com/w/file/fetch/144458373/27623875921.pdfIn PDF document text
    • http://risuxujuvu.pbworks.com/w/file/fetch/144517761/ccna_chapter_8_quiz_answers.pdfIn PDF document text
    • http://xalanupuzewo.pbworks.com/w/file/fetch/144597177/riterenapegazarize.pdfIn PDF document text
    • http://giresizuloki.pbworks.com/f/61353930300.pdfIn PDF document text
    • http://pinurakus.pbworks.com/f/castrol_syntorq_lt.pdfIn PDF document text
    • http://siwuromo.pbworks.com/f/twilight_saga_part_3_full_movie_in_hindi_dubbed_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08c8928e-8a0b-4301-8cf0-22d68462dc67/la_familia_de_pascual_duarte_resumenes_por_capitulos.pdfIn PDF document text
    • http://wixugigir.pbworks.com/f/scroll_compressor_working_principle.pdfIn PDF document text
    • http://jinotofatum.pbworks.com/f/cfa_program_curriculum_2020_level_1_download.pdfIn PDF document text
    • http://kekirow.pbworks.com/f/tense_chart_english.pdfIn PDF document text
    • http://lebunurivugu.pbworks.com/w/file/fetch/144467304/your_name_sparkle_piano_sheet_music.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_off0000ef6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6A 5640 bytes
SHA-256: 37a8f3a51c11ddc83135da896fe0b64dfe00086f90846096a6a4cb670ea2dbe3
font_01_sfnt_off00010288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10288 11168 bytes
SHA-256: 954ef3341f2abd597f37c7395d5252a17fb8dc7270fbbd8c166c373804a1a62f
font_02_sfnt_off00012893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12893 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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