Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc87542dd5e14e70…

MALICIOUS

PDF

81.3 KB Created: 2021-04-16 19:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 026a56420469b1e382d6f17c810f551d SHA-1: 83571e2547bd98ae88ec61eeafab4d23df15f661 SHA-256: dc87542dd5e14e707f5aa7925bd35bd1fcf5668f13702a466a3fbc949a2f5a1c
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 0.9995

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/strik?utm_term=diana+her+true+story+audible PDF link annotation
    • http://rameautbxy.space/nervous_form_of_ketosis_in_cattlet8e5j.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosenijosu/jgrheif/wizarding_world_of_harry_potter_london_prices.pdfIn PDF document text
    • http://prequester.online/gifexusixake3lgwj.pdfIn PDF document text
    • http://hellesypakk.online/marguerite_duras_livresjp5fk.pdfIn PDF document text
    • http://callup.today/929257872485g7qk.pdfIn PDF document text
    • http://50offshop.info/how_to_unlock_a_luxpro_thermostatj41rm.pdfIn PDF document text
    • http://prodson.fun/sundance_hot_tub_parts_near_meiwkuq.pdfIn PDF document text
    • https://cdn.sqhk.co/vikaxokaso/hhhiirV/14873846528.pdfIn PDF document text
    • http://triple-doska4.club/53684682985t10qg.pdfIn PDF document text
    • http://itdiscount.pro/catherine_ponder_prosperity_affirmationsarz5q.pdfIn PDF document text
    • https://cdn.sqhk.co/zabitokepum/axjSIUK/flat_equalizer_bass_booster_volume_booster.pdfIn PDF document text
    • http://instofficial.online/the_musicians_guide_workbook_secondlsjaz.pdfIn PDF document text
    • http://zanartcc.net/27394373031j9ht7.pdfIn PDF document text
    • http://olymptrade.buzz/nutoguwibudusokenafigof4m.pdfIn PDF document text
    • http://supportcopyright.net/35656207948cthau.pdfIn PDF document text
    • http://olipaka.xyz/kenmore_water_softener_repairman8g5m8.pdfIn PDF document text
    • https://cdn.sqhk.co/pabilere/gghbNif/lumberwhack_defend_the_wild_download.pdfIn PDF document text
    • https://cdn.sqhk.co/soxosovave/HlQiagg/uphill_rush_7_unblocked_games.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/iisjghi/what_causes_cold_patches_on_skin.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
    • https://uploads.strikinglycdn.com/files/b7712ad3-946a-4b5d-8a83-f3a18a274821/what_is_firmament_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25a9d4c4-24e1-4ddb-a1d8-64e8cf42e603/24438073082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5da10c3-a0f3-4edb-ab35-66922ad4b378/what_does_the_end_of_rise_of_skywalker_mean.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_off0000f208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF208 5036 bytes
SHA-256: a23d6fa655f6fab9d5ff57f616e505c668e2e7e80d0adc9cd068b2c114c89db7
font_01_sfnt_off0001031a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031A 10744 bytes
SHA-256: 53324c88abfa92b4e22fa588d93c909dee875d2bdf42ab79ab23b9304ae1720c
font_02_sfnt_off000127f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F3 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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