Malicious PDF — malware analysis report

Static analysis result for SHA-256 a07b82e746c4e962…

MALICIOUS

PDF

71.5 KB Created: 2021-02-19 16:32:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: de1cc35a493ec80b8b03935eafad924f SHA-1: 638b7b7d06b428aaf6f31ac92532658026bb2271 SHA-256: a07b82e746c4e962e7f40dfa422ed32316de381089c5d52742d8818f2aa8984d
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://yafferge.ru/wix?keyword=versa+manual+transmission+fluid In PDF document text
    • http://giveaway2020.info/sheet_metal_deburring_tool_near_mezjsc5.pdfIn PDF document text
    • http://jimefat.22web.org/new_bhojpuri_movie_2018_free.pdfIn PDF document text
    • https://cdn.sqhk.co/resasenubori/P1ctjeo/world_war_z_season_2_roadmap.pdfIn PDF document text
    • http://topcreditreport.info/crusader_kings_2_guideoqspw.pdfIn PDF document text
    • https://cdn.sqhk.co/dakuwuwuzije/Hggeyjg/crash_team_racing_nitro_fueled_ps4.pdfIn PDF document text
    • http://velesvoyage.ru/the_weatherly_guide_to_drawing_animals_dvd_volume_onel9hjp.pdfIn PDF document text
    • https://cdn.sqhk.co/gazejuruni/jVnhfXk/be_kind_watercolor_happy_planner.pdfIn PDF document text
    • http://vannlight.ru/polishing_3d_printed_metal_partsk8dzc.pdfIn PDF document text
    • http://pihodze.com/37181822938e9ozw.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/mojivikapeti/ek_chumma_song_hd_video.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/75934545899.pdfIn PDF document text
    • http://pudedenos.epizy.com/minccino_evolve_forms.pdfIn PDF document text
    • http://pazipinabobon.epizy.com/duseputusun.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/amar_ujala_newspaper.pdfIn PDF document text
    • http://fipabadidori.epizy.com/university_of_nottingham_quality_manual_extenuating_circumstances.pdfIn PDF document text
    • http://powazov.rf.gd/dungeons_and_dragons_5e_druid_character_sheet.pdfIn PDF document text
    • http://lefamuredemupi.epizy.com/teddy_bear_barbie_doll_bangla_song.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/basic_income_statement_template.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_off0000dddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDF 5016 bytes
SHA-256: 51864fe96942a3e2047e139f77f6917d9cc5ce3b2d912ac6b729e95b37af88f8
font_01_sfnt_off0000eeda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDA 10032 bytes
SHA-256: b6fc7dc96e9385628c0c7029e03fa3d78499b562e37478aeeb885dc131cb9a6f