Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ecae4a362db9ef7…

MALICIOUS

PDF

73.7 KB Created: 2021-03-08 22:59:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 478a97411137f26115bdfe95f19017e1 SHA-1: 11301ffde89cc88703a252847dd00c6219a2fb46 SHA-256: 1ecae4a362db9ef7ccf3e764885181a2a81bfe7605a60014675a9cfb3e683903
186 Risk Score

Malware Insights

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

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 0.9956

Heuristics 6

  • 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 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://soxebez.ru/strik?utm_term=tales+from+the+neverending+story+the+gift+2001 PDF link annotation
    • https://cdn.sqhk.co/riwutosax/j8gjjBX/16999663075.pdfIn PDF document text
    • https://cdn.sqhk.co/runetonorox/ibjehfl/coloring_book_free_online_games.pdfIn PDF document text
    • https://cdn.sqhk.co/wibafozadil/gjihDif/blackpink_jennie_solo_song_lyrics_english.pdfIn PDF document text
    • http://levotavo.scienceontheweb.net/26918743197.pdfIn PDF document text
    • http://mixutadumekaje.mypressonline.com/sing_pentatonix_lyrics_deutsch.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/dgjqjb1/sutusobemebadebujimodov.pdfIn PDF document text
    • https://cdn.sqhk.co/viwedanej/hzLgioC/99544733082.pdfIn PDF document text
    • http://vizenam.medianewsonline.com/rounding_decimal_places_worksheet.pdfIn PDF document text
    • http://sitebomobegux.sportsontheweb.net/bamafiberulil.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/77411297690.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_eb0bf535a51d49d6b8b4dc33abbab5ba.pdf?index=trueIn PDF document text
    • https://e3e1c2aa-7f41-47b0-8c2f-d823cb48b857.filesusr.com/ugd/7598fa_3c4afaaf6c4847bf9b58667c28912aa7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea6b0c29-3346-47bf-b892-8a7d67468b7d/el_principito_pelicula_online_1974.pdfIn PDF document text
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_6b19770be06a443da43d5ea6fb2ce3b2.pdf?index=trueIn PDF document text
    • https://f608bf75-187c-4b28-9621-af925c05c2b6.filesusr.com/ugd/05e3ad_4e45b42a2fd94cf3b9f9937f5e59c866.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/60907c61-2cbe-43fc-8b8a-17d6f8ef7ac7/brand_identity_design_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/805cd324-18d1-46a8-9c8e-f82f7dd7731f/digitech_rp360xp_looper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59979f9a-28c6-4b54-b415-fe448fe769c0/99646858378.pdfIn PDF document text
    • https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_f1602c55683847ffb7829d79d6248fea.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/676c14b3-af37-489c-a2aa-bf054398c8e1/nepaxufogumunuxuvona.pdfIn PDF document text
    • http://netawuwimirixor.onlinewebshop.net/how_to_identify_fruit_trees.pdfIn PDF document text
    • http://valupakukav.myartsonline.com/how_to_clean_roomba_brushes_error.pdfIn PDF document text
    • https://8772a198-af03-49ef-8724-5feb7546cb8a.filesusr.com/ugd/436f04_15ef000c7ad54f3893adbbffaed1a93a.pdf?index=trueIn PDF document text
    • http://zikoliduxa.atwebpages.com/warhammer_40k_audio_books_download_free.pdfIn PDF document text
    • https://7095e710-59ac-4d27-8a5a-f3bbcaf65deb.filesusr.com/ugd/418e76_03b5a28bb7bc490a9ff4b2f8f482bc84.pdf?index=trueIn PDF document text
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_5d1c0da5ece748b5a3ddeffd3a782565.pdf?index=trueIn PDF document text
    • https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_65360cae217f41d2a9efce9544e2263f.pdf?index=trueIn 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_off0000df6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6A 5760 bytes
SHA-256: fc9dfb82897ad0b2ec6647ab3020a3788dc3d753998b25603708c58c584d693d
font_01_sfnt_off0000f2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2ED 11616 bytes
SHA-256: 4f999eb150deccb3af312235a7c3bfd0db90b4781179da94a847f790f2c46d06