Malicious PDF — malware analysis report

Static analysis result for SHA-256 91ec264d34caebcb…

MALICIOUS

PDF

73.1 KB Created: 2021-03-17 21:24:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 44f9ee9d1ffed1c7e232734378d76e79 SHA-1: 0c054cd9a4b1df2788a1e9a6606653f394e1c534 SHA-256: 91ec264d34caebcbc5fa7750511879582290b2547701e14f38dc91e4f617212d
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URL that redirects to a malicious domain, likely as part of a phishing or scam campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host multiple links on disposable domains, further supporting a malicious intent. No scripts were extracted, but the presence of external URIs and the ML classifier's high confidence suggest a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 4

  • 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://mezovuduw.ru/award?keyword=landslide+chords+pdf PDF link annotation
    • https://cdn.sqhk.co/kobadaxo/XXfjjxG/employment_application_form_template_free.pdfIn PDF document text
    • https://cdn.sqhk.co/ketusugedi/gjgeNjc/pexmor_yoga_half_ball_balance_trainer.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/hjtpBw6/borokedukiguxom.pdfIn PDF document text
    • http://dusibarupuguli.medianewsonline.com/how_to_do_regression_analysis_statistics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368487/normal_60027962ee511.pdfIn PDF document text
    • http://fuxuxixigu.scienceontheweb.net/3580164684.pdfIn PDF document text
    • https://cdn.sqhk.co/pobopuwubox/PThgoLD/zigzagoon_shiny_pokemon_sword.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414672/normal_60343a01c70d5.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/MHhgEhg/27659483432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_6035490ae0adc.pdfIn PDF document text
    • https://cdn.sqhk.co/xagunetoxa/ghbhduu/foosball_table_dimensions.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/Igifjdu/disney_princess_cake_making_videos.pdfIn PDF document text
    • http://lotibamuzuti.scienceontheweb.net/lg_d415_rom_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fewoxenovof/dA6CgXb/jelly_shift_mind_satisfying_games.pdfIn PDF document text
    • https://cdn.sqhk.co/beledufe/CTuggjb/24322004522.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
    • http://mafonevaverazux.atwebpages.com/11802335975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3a31e53-a551-4374-939a-93473cdecd58/trane_ac_supply_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/175ad094-477b-456e-b827-97c89bd174eb/noxulewawatiziwedogak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50f27976-cf5b-4a2f-9207-d357378a244e/charles_dickens_a_christmas_carol_animated_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4269ad39-16ae-414b-86a3-5488b7383c05/weweziwir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5df1f86e-fbbb-4246-9367-aad05b22893a/anleitung_gopro_hero_4_silver_deutsch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f6dc4cc-cedf-4f55-83c9-4b470c734b9e/seth_klarman_letter_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f03f04b-e0d2-4f64-a36f-5ca168089ccc/wejakezolowozokivoxazupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08b715d3-088d-4dca-8a19-5e0ed045ddc5/is_slavery_illegal_in_the_united_states.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_off0000d4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B4 4892 bytes
SHA-256: 9cacc77a2368ed60b5e016a11a6fdbec719b7587da6f828df6f341eaa83d7a50
font_01_sfnt_off0000e53b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53B 10404 bytes
SHA-256: 2301256a5051ceca2337011df7e0a5a1c358d412c2966d8ce7008cd1a692f7d1
font_02_sfnt_off000108e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E4 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378