Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa4ecafb2964443…

MALICIOUS

PDF

74.3 KB Created: 2021-03-31 22:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 70c129be8d53b512e1c9886a1205164a SHA-1: 7243ba696ff93ece47389ae9303cf1d897eaf33d SHA-256: eaa4ecafb2964443da85846cabad2e80bc7b7dfab34b37d660be27dd04e8c463
126 Risk Score

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 0.9991

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 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://dugedepap.ru/123?utm_term=bending+of+a+cantilever+beam+lab+report PDF link annotation
    • http://fimokeroda.22web.org/temperament_scale_for_adults.pdfIn PDF document text
    • http://zinekob.66ghz.com/77204346.pdfIn PDF document text
    • http://zujonatuvetivux.iblogger.org/what_makes_the_plates_move_brainly.pdfIn PDF document text
    • http://storeyou.store/17293122100e0iul.pdfIn PDF document text
    • http://linza.media/pretty_little_liars_the_perfectionists_dana_bookerfgzr5.pdfIn PDF document text
    • http://fb-pageunderreview.com/crossed_ally_condie_epubtgi2d.pdfIn PDF document text
    • https://cdn.sqhk.co/fewoxenovof/Lgf3jbZ/xasuwet.pdfIn PDF document text
    • http://igonlinesupport.com/funivumugewafowed08.pdfIn PDF document text
    • http://bexukitekivotap.22web.org/61708933955.pdfIn PDF document text
    • https://cdn.sqhk.co/rorifugera/6gScjdU/love_yourself_answer_bts_zip.pdfIn PDF document text
    • https://cdn.sqhk.co/parikozug/gj0jd0f/best_car_crashing_games_xbox_360.pdfIn PDF document text
    • http://wokelegekak.66ghz.com/bengali_calendar_1427_app.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/6iWgfLx/daily_deals_muskegon.pdfIn PDF document text
    • http://siondez.ru/around_the_world_in_80_days_chapter_18_summarys55r2.pdfIn PDF document text
    • http://mattelipsticks.site/darlinghurst_school_ofsted_report_20168if6e.pdfIn PDF document text
    • http://xiselegudiwip.iblogger.org/35791171693.pdfIn PDF document text
    • http://usblighter24.site/punctuating_dialogue_worksheet_grade_6kb96e.pdfIn PDF document text
    • http://tarusexozof.iblogger.org/bemik.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/b0VkbRW/bekuxekuvukepabapuliwokaj.pdfIn PDF document text
    • http://sanezukevuzav.iblogger.org/gezik.pdfIn PDF document text
    • http://edapog.online/adobe_reader_for_apple_ipadyuxhz.pdfIn PDF document text
    • http://negozio50sconto.info/tisigik86ajj.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/luworizesupox/77211086533.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/33169809988.pdfIn PDF document text
    • http://sowinoto.epizy.com/glossary_of_administrative_terms.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_off0000e494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE494 5544 bytes
SHA-256: 5a469a9484c8fa626899e5c59a47d521bb0411eeb61575fb8cce568f0b6a3143
font_01_sfnt_off0000f76a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76A 10552 bytes
SHA-256: 678eb676e56400f91328a17aeb7269ca7b0895231dd99d3a8ddf1f1a4fb552c6

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