Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7edbed4b754a2f4…

MALICIOUS

PDF

85.8 KB Created: 2021-03-25 11:53:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 54276669f16fe28a1b585bded4be67de SHA-1: 230a1062eed960215ee64b38a9a0882c52f8a308 SHA-256: d7edbed4b754a2f47def9eb337551ef76877fbd68e16fed2c5e75596e0b9bbf3
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 0.9992

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=what+flowers+to+plant+in+february+in+florida PDF link annotation
    • https://cdn.sqhk.co/gujowaxexag/rif0Tgg/rise_up_lyrics_and_chords_andra_day.pdfIn PDF document text
    • https://wefizaxire.weebly.com/uploads/1/3/0/9/130969527/nafafesefipivut.pdfIn PDF document text
    • https://cdn.sqhk.co/rurufimibiwe/fgjI2cC/ninja_air_fryer_xl.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/hh40jdM/ticket_to_ride_europe_game_board.pdfIn PDF document text
    • http://genusadnlo.space/standard_en55024_downloadi8s8a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463785/normal_5fe3d54413f31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_60149ee5e92c5.pdfIn PDF document text
    • https://cdn.sqhk.co/dagosasojo/e2zijI7/math_arcade_chromecast_games.pdfIn PDF document text
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/4945083.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478393/normal_60276bc2b3bfc.pdfIn PDF document text
    • http://proita.space/xidedujifawumi6iqiw.pdfIn PDF document text
    • http://ro-shop.space/bosch_silence_plus_44_dba_manual1zwbr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408004/normal_600bf8bac382f.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/ahehghe/77400053725.pdfIn PDF document text
    • http://biomanix.best/adidas_neon_green_running_shoes0ma52.pdfIn PDF document text
    • http://ca-management.website/add_canon_mg3520_printer_to_wireless_networkr67n5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368763/normal_5fed12461d93e.pdfIn PDF document text
    • https://muduzefob.weebly.com/uploads/1/3/4/0/134018051/e2047676.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486051/normal_5fe20eee555ba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/purixifusipelid/2839159269.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/3799579045.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/49330899456.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/97067505304.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A2 5360 bytes
SHA-256: 419a5beb4529e6b4c9784e5a826e45f880548fd090c103fabda64c228f0c459f
font_01_sfnt_off000118ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EC 10092 bytes
SHA-256: 6c024136aab652c092287c8be755015a8a91f9d25469611ad4ff58ff500e1ed6
font_02_sfnt_off00013b97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B97 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2