Malicious PDF — malware analysis report

Static analysis result for SHA-256 d208e61d89c9e3ed…

MALICIOUS

PDF

89.9 KB Created: 2021-03-31 10:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5705506e89341feaa357cde7f71f83e7 SHA-1: 1199b08b5fbeb054f10252daecba501cbda101fa SHA-256: d208e61d89c9e3ed0609fdb256ea5dadb5c19a156cfe7c8d65f81c8f1bcad6a7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, and contains a large number of external links, suggesting a link farm or SEO manipulation tactic. One of the primary URLs points to a domain associated with potentially malicious content, while others are benign. The document body is heavily obfuscated, making it difficult to determine the exact user-facing lure, but the presence of numerous external links is a strong indicator of malicious intent, likely to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • 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://kuzutuzo.ru/award?keyword=autocad+civil+3d+tutorial+pdf+2020 PDF link annotation
    • https://vizisovi.weebly.com/uploads/1/3/4/1/134131984/muwuti.pdfIn PDF document text
    • http://pidoxabomekoju.iblogger.org/pdf_splitter_and_merger_download.pdfIn PDF document text
    • http://gulakami.22web.org/langston_hughes_high_school_death.pdfIn PDF document text
    • https://zopodiwozexuma.weebly.com/uploads/1/3/4/7/134737972/1055710.pdfIn PDF document text
    • https://wefigoga.weebly.com/uploads/1/3/4/0/134041661/343525.pdfIn PDF document text
    • http://dadefuxafovub.22web.org/collateral_beauty_mp4_full_movie.pdfIn PDF document text
    • https://dibalinelig.weebly.com/uploads/1/3/1/3/131380687/rewome-melalat.pdfIn PDF document text
    • http://sovolox.getenjoyment.net/73469190277.pdfIn PDF document text
    • https://xuzopodoker.weebly.com/uploads/1/3/0/7/130738955/7da1576042c3.pdfIn PDF document text
    • http://xiwupulo.medianewsonline.com/pugejevumefip.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/dorulusof/bless_me_ultima_audiobook_mp3.pdfIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/icse_results_2019_class_10_marksheet.pdfIn PDF document text
    • http://belibivizonojo.myartsonline.com/luligodelabuluxerinoxeri.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/amended_tax_return_form_8863.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/antique_olive_compact_italic_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcba0d91-9cc2-4dfc-ac1a-cee4561364db/the_secrets_we_keep_movie_trailer_2020.pdfIn PDF document text
    • http://tiwogiponifi.rf.gd/307101575.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/oraciones_con_pronombres_posesivos_en_ingles_y_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60877e14-5922-4f3a-9871-b7751ef19630/zujeponolejulerinax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51d3d676-f95c-43e4-8ff3-f7a712312208/wakurivodanonemavafat.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/vanity_fair_subscription_address_change.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/50927194255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4344932a-97fa-423f-98fc-5cc16a4906bd/best_at_kung_fu_tea.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a97482ef-25e9-4a6e-a2ec-39e476d39e0a/best_fingerpicking_electric_guitarists.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_off00012264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12264 5456 bytes
SHA-256: 33493fe1224f05948b3fc310caf750cc7752833a91b6b33925cdd1eaaac52af1
font_01_sfnt_off0001350f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1350F 10920 bytes
SHA-256: 76517e7eb7d5a40f1b61f20a356489d5dffce69dd763683726fa39030d20d9d7

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