Malicious PDF — malware analysis report

Static analysis result for SHA-256 475548245524d2b1…

MALICIOUS

PDF

70.6 KB Created: 2021-01-15 23:54:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c6837c57ab0001d1a0b3d3116739d502 SHA-1: 4d52bd93afdc31f44e93b40a887f842ebae3fae8 SHA-256: 475548245524d2b1579bb6e53132814dfd2981c84b0ea1ff9e65669b52a2c5cc
156 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 0.9998

Heuristics 5

  • 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.
  • 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://trafffi.ru/123?utm_term=who+sang+they%2527re+coming+to+take+me+away+lyrics PDF link annotation
    • https://niruzezigup.weebly.com/uploads/1/3/4/8/134889773/3606516.pdfIn PDF document text
    • https://pibemalogodozod.weebly.com/uploads/1/3/2/6/132681910/tawararezobij-xirem-xujububaz.pdfIn PDF document text
    • https://site-1199244.mozfiles.com/files/1199244/business_strategic_planning_cycle.pdfIn PDF document text
    • https://site-1168232.mozfiles.com/files/1168232/harvest_church_memphis_elders.pdfIn PDF document text
    • https://site-1177940.mozfiles.com/files/1177940/bulavuzesaxaposi.pdfIn PDF document text
    • https://xalorato.weebly.com/uploads/1/3/4/3/134317389/kijorewejox-puludirakaviwa-rodawin.pdfIn PDF document text
    • https://site-1178617.mozfiles.com/files/1178617/79775465445.pdfIn PDF document text
    • https://site-1173325.mozfiles.com/files/1173325/toppr_plus_promo_code.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/xulepiwa/zaxutejukodelul.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/tareekhi_books_in_urdu_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/ishares_global_clean_energy_etf_fact_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/world_war_1_propaganda_worksheet_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/revdl_android_game_gta_san_andreas_revdl.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_off0000d60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60D 5520 bytes
SHA-256: 48d0e49269c5d82aef2f7bfa794d13c0851c7d091adc3bcb2f6d6b6c5b29af11
font_01_sfnt_off0000e8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CD 10484 bytes
SHA-256: 47f699abfb1393b57fd919f23a2cfe802875efebdd1645eb9609df9106104e61

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