Malicious PDF — malware analysis report

Static analysis result for SHA-256 6edee507a562d8d8…

MALICIOUS

PDF

83.0 KB Created: 2021-05-17 08:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d3034500d1d87fd1a15e2b566c178561 SHA-1: bcb5741ce59e581508ca53835f853cac63ca4aea SHA-256: 6edee507a562d8d8575c0dda3fe56afaaa25349be5d7de740a29d07b99c6004f
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, indicating a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of embedded URLs and the overall structure suggest an attempt to redirect users to potentially malicious sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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://nipisod.ru/strik?utm_term=dell+precision+m4700+mobile+workstation+specifications PDF link annotation
    • https://darojavanobize.weebly.com/uploads/1/3/4/8/134889586/wodetodorejeditaduja.pdfIn PDF document text
    • https://kufavugozit.weebly.com/uploads/1/3/5/3/135309998/77d7616b9e00c.pdfIn PDF document text
    • http://bijepitujutix.sportsontheweb.net/4510332110.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/AKjfYid/14830405242.pdfIn PDF document text
    • https://cdn.sqhk.co/ridijafugemi/faA57jh/moviestarplanet_hack_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gixezovof/gjpJ0hb/tuxunigeruz.pdfIn PDF document text
    • https://cdn.sqhk.co/parikozug/ARihDhd/tupoxogasukapimevozu.pdfIn PDF document text
    • https://cdn.sqhk.co/dikapagoloza/eDu4jbK/mining_inc_remastered_codes_august_2020.pdfIn PDF document text
    • http://goxamid.mypressonline.com/41468154361.pdfIn PDF document text
    • https://cdn.sqhk.co/gedodupem/jehhNhh/video_of_bahamas_hurricane_dorian.pdfIn PDF document text
    • https://lomowurepiv.weebly.com/uploads/1/3/1/4/131437546/fegabirisuzemed-zorapo-banatutadamibad-gugel.pdfIn PDF document text
    • https://cdn.sqhk.co/videmixolute/iezDgh2/2_player_foosball_online_game.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/Iajhity/chocolate_cake_recipe_with_buttermilk_and_boiling_water.pdfIn PDF document text
    • https://cdn.sqhk.co/bepesewutu/dbgiPkX/secret_of_mana_ps4_multiplayer_einstellen.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/baxunaf/wikizoxuganebupudeza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/263d13a1-296b-4c76-95ae-30ce0864fe93/carry_on_baggage_size_american_airlines_international_flights.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d1506be-9381-42e6-9b91-7a64d7aa2a24/warrior_cats_names_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fed13d5a-361a-42f6-a286-e3f3dbdaa7f6/firagaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45dc82fa-860b-495f-99f3-b4825d54aa2a/apple_tv_3rd_gen_app_store_missing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dc8414f-7935-463f-a6b0-58e2623789bf/how_to_pair_2_jam_double_chill_speakers.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/crystal_reports_totext_arguments.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/kabir_singh_movie_counter_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/puximubagaxuzaliluku.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/free_messenger_bot_templates.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_off000102ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102ED 5768 bytes
SHA-256: fc290033149454337420756f52fcd6ab1a752418bb5747e45046026f5714ad7c
font_01_sfnt_off0001169c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169C 11472 bytes
SHA-256: 580ba00c2c1d7e4944cbf8cc8183f8ca2e5a08c0767372c4610b5f6ad47ab37f