Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee3c2450a5860c9…

MALICIOUS

PDF

71.0 KB Created: 2021-03-04 18:26:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 34417abc0b66f28d2ea8d9178dd38701 SHA-1: 24688b4af5714950af7e60f913a1d1c0fe832b21 SHA-256: 4ee3c2450a5860c977d2deaed68add2df3ad8e9aeab5e5f85cc31cff68eb15e3
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/award?keyword=operating+system+concepts+silberschatz+10th+edition PDF link annotation
    • https://cdn.sqhk.co/nomitusibop/ijiigjb/43270261763.pdfIn PDF document text
    • http://flash-sar.online/marksheet_number_mumbai_universityskeam.pdfIn PDF document text
    • https://cdn.sqhk.co/zawileveruz/jahiu5e/heroes_2_the_undead_king_pdalife.pdfIn PDF document text
    • https://jasofemelufes.weebly.com/uploads/1/3/0/7/130740231/6d2d5c9cdf947.pdfIn PDF document text
    • http://naturfresh.fun/reduvabizokisu6ndx7.pdfIn PDF document text
    • https://famexowizesiz.weebly.com/uploads/1/3/4/3/134359716/rebemivim.pdfIn PDF document text
    • https://cdn.sqhk.co/fopikudapom/Rjehiif/xujid.pdfIn PDF document text
    • https://webakutukulufu.weebly.com/uploads/1/3/2/6/132683024/6112621.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/9ifiegi/monkey_king_movie_animated.pdfIn PDF document text
    • https://cdn.sqhk.co/futipujorup/hwAictC/warships_universe_naval_battle_mod_apk_android_1.pdfIn PDF document text
    • https://sudopefizumizer.weebly.com/uploads/1/3/1/3/131383323/xoxinaxov.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/fqmhbZw/vuwurepemarujiranuxu.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebosatu/KmmHOie/4060288184.pdfIn PDF document text
    • https://cdn.sqhk.co/gimexigerub/ggUUdgc/tor_browser_android_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/gcRXhdq/31398963647.pdfIn PDF document text
    • http://topsale.pro/mojogugemizaciiyr.pdfIn PDF document text
    • https://silorofolukut.weebly.com/uploads/1/3/4/2/134265947/ce0193e2.pdfIn PDF document text
    • http://olivamebel.com/lonetipinumagelowigififa0n7va.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/lusabifef/cisco_anyconnect_mac_os_catalina.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/annuity_factor_table.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/59368361254.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/52095786614.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/new_movies_free_site.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/scream_go_hero_hack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/arranque_significado_informatica.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_off0000d66a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD66A 6000 bytes
SHA-256: b4687c68fe9b2b9dce3b51d1a5495a972f20084b3824bf956613ea0a65112f47
font_01_sfnt_off0000eab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB9 10328 bytes
SHA-256: 955db30405da9e162029ca315fc5a9ba5d288838d52120be6e119c239ca6956b

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