Malicious PDF — malware analysis report

Static analysis result for SHA-256 401a21bd81ecb0a6…

MALICIOUS

PDF

80.1 KB Created: 2021-03-27 10:26:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c496e1c29a10081817def0b46c303758 SHA-1: 8395a60db68e641923921186218d4c84598ac628 SHA-256: 401a21bd81ecb0a699549df9cf0696f2dc611d58a091cef0d4ec9058e5cf8ce9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://midufefew.ru/wix?keyword=directv+pensacola+channel+guide PDF link annotation
    • http://axecheat8.xyz/ncert_english_grammar_book_for_class_8a70k1.pdfIn PDF document text
    • http://badge-verification-center.com/ti_ba_ii_plus_professional_tutorialefcoq.pdfIn PDF document text
    • http://reestr.site/how_do_i_set_up_airprint_on_my_hp_printerfgmx4.pdfIn PDF document text
    • http://atomyimperial.ru/paduvajumuxud9yny.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://968bac2e-1409-45a7-bd11-2c37eba47390.filesusr.com/ugd/c81504_1b72284e66634cd0a47326d76add214c.pdf?index=trueIn PDF document text
    • https://1864c106-1a4f-4194-99fb-dabd5a0af450.filesusr.com/ugd/17b194_d40cbbe71c514cbc81bf224f1f9aa766.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/meludav/zinegukuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2db6f494-1796-46b8-84ea-d183dcbed480/how_much_does_a_wolf_induction_cooktop_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/349398cd-b4fe-47a7-b10b-ce2203190dbc/vebifavabujaped.pdfIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_619b763a94474893a0fc1739790b72af.pdf?index=trueIn PDF document text
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_5fb0bf56d5484c778b46ab35cbda142a.pdf?index=trueIn PDF document text
    • https://147762ec-90f0-4523-8579-43cb3cd17c82.filesusr.com/ugd/6c48b9_fe3d8c4c14cb4818b46f068981e6197a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/118_east_freeway_traffic_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/estimate_the_sum_word_problems_worksheets.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/the_uglies_book_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/ill_at_ease_crossword_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb509f79-dd7f-4a68-a603-b81f0c8a6f60/biwosasusaraj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cdbc0da-21a1-4965-b4d4-a21f217282a4/violin_minor_scales_finger_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/peak_backup_camera_installation_video.pdfIn PDF document text
    • http://pajupevezujugut.atwebpages.com/ages_problems_for_bank_exams.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38fdf8fb-e58f-4ca0-a68c-fb911e86a875/63886415081.pdfIn PDF document text
    • http://minivenema.atwebpages.com/35981157683.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_off0000f98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98B 5396 bytes
SHA-256: 7359aa5baa8908c4fc39f18a57bef18d8c708b907c2481ec4d4970d64348fa22
font_01_sfnt_off00010be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE9 11532 bytes
SHA-256: 0e358458a40cdf3583f5dbe22947aee1e5ac3576f9f96a6132ed861eff225e83

Open this report in the interactive analyzer, or submit your own file for analysis.