Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e1e6d6023f8750…

MALICIOUS

PDF

80.8 KB Created: 2021-03-15 08:00:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: ec0cb277f1e17d46b52c93f2c1f4b7f8 SHA-1: a79aa023bb59c2ef4643e31f1875da36bcd3be34 SHA-256: d3e1e6d6023f8750a08f0cc9328c83135615d86914ebb0e24ba137c53697a172
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ponafet.ru/award?keyword=the+curious+case+of+benjamin+button+pdf PDF link annotation
    • https://cdn.sqhk.co/jerusuxelek/fhgjcic/12170891249.pdfIn PDF document text
    • http://ru-order-687646765445.art/xixozakotubevypw1t.pdfIn PDF document text
    • http://lp-consalt.ru/astro_a20_wireless_xbox_reviewaljyi.pdfIn PDF document text
    • http://ergors.space/arbeitszeugnis_formulierungen_verhalten_gegenber_vorgesetztenjvvub.pdfIn PDF document text
    • http://biweekamnf.com/xakojazdly47.pdfIn PDF document text
    • https://cdn.sqhk.co/siviraboriru/iNahgpR/ultimate_breeding_guide_sword_and_shield.pdfIn PDF document text
    • https://cdn.sqhk.co/dibadigodem/iihfonx/digestion_plus_arbonne_dupe.pdfIn PDF document text
    • http://srakan.space/fuwenopena1wrc0.pdfIn PDF document text
    • http://llloooodddd.space/pazagamu72w.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/c0ifjhM/kenujurip.pdfIn PDF document text
    • https://cdn.sqhk.co/fotutubujuf/jjjPZij/illustrator_menu_templates.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/jieN40J/gimme_shelter_movie_review_rolling_stones.pdfIn PDF document text
    • http://guitar.su/impulse_response_in_simulinkzp2u5.pdfIn PDF document text
    • https://cdn.sqhk.co/vadezewe/7Tv3DNl/powenewuzetijapika.pdfIn PDF document text
    • http://cardioactiveuficiale.site/2956402762598dxq.pdfIn PDF document text
    • http://all-system7.club/unstressed_vowels_worksheet_ks2o1h18.pdfIn PDF document text
    • https://cdn.sqhk.co/xumelesep/ihbBieR/screen_recorder_no_watermark_free_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/lagolipumepi/gghigiR/90_s_album_songs_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/axgfibT/identity_v_joseph_azrael.pdfIn PDF document text
    • https://cdn.sqhk.co/musezikuzapi/jvfk6he/nivijuvufusufel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dfdccaec-9019-42eb-ab8c-14eed22d5f88.filesusr.com/ugd/2e00cc_e9fda38bd2fa4dc9b4c0389ab19f85d7.pdf?index=trueIn PDF document text
    • https://9334512a-4df1-45dc-8804-f0fa1d9e2a3d.filesusr.com/ugd/9466eb_7ed8368df8b04db98e0b850b20f49ee3.pdf?index=trueIn PDF document text
    • https://8dac4d01-2cd1-45d2-8b5f-6005f802adc9.filesusr.com/ugd/1f96ce_f4446c159457453fad65721ecc83820c.pdf?index=trueIn PDF document text
    • https://fe426b01-1dd0-498a-b08e-7ec37e320b94.filesusr.com/ugd/6b45f0_bc205a0b39c943fe93cfc66c52ad91fd.pdf?index=trueIn PDF document text
    • https://d321836a-1bf8-47c4-b4d3-67fe1e7f0250.filesusr.com/ugd/33ab24_6014be4e768747208bff2d68a3718675.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_off0000fcd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD4 5528 bytes
SHA-256: 04b50c73a4735f484a7ead44527beafb98e27d2b9bf54a708408fab79f7e0f24
font_01_sfnt_off00010f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F74 10664 bytes
SHA-256: 14fe2ef5a8633c1f2eb4ecee3d1a3444a90546aa8c577c65a41bccab3020b31a