Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd2e33810c39cdf8…

MALICIOUS

PDF

81.7 KB Created: 2021-04-18 03:08:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e83370f516ed7691151e0c1b679fc57e SHA-1: 5ad03be4b8e9b84475115aba2f21d5157f9329d3 SHA-256: bd2e33810c39cdf814f1ab13898037f294c8d54ef8291ae2b5e75f1f9bff29b5
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://druttle.ru/strik?utm_term=2001+subaru+outback+h6+3.0+vdc+problems PDF link annotation
    • https://vedixoba.weebly.com/uploads/1/3/4/8/134864822/wimevorobajobasaja.pdfIn PDF document text
    • https://vedexojofidas.weebly.com/uploads/1/3/4/5/134581268/ce6d31e2bf8.pdfIn PDF document text
    • https://fuxarudoniw.weebly.com/uploads/1/3/5/3/135350341/zasebe.pdfIn PDF document text
    • http://tasexevixeve.iblogger.org/spotify_premium_free_apk_file.pdfIn PDF document text
    • http://waduresiwiboba.iblogger.org/80803613357.pdfIn PDF document text
    • http://zumufaxe.iblogger.org/putigamimimufopuzidar.pdfIn PDF document text
    • https://davugunibelerab.weebly.com/uploads/1/3/4/6/134612729/808b60832096f38.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/40f7d6b0-bf7b-49f5-9368-429fa43fcca8/63807537599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50300191-49d0-4a56-8c7e-7199013ab238/i_hate_to_see_that_evening_sun_go_down_lyrics.pdfIn PDF document text
    • http://retetopipazaned.epizy.com/ct_coronary_angiogram_nice_guidelines.pdfIn PDF document text
    • http://sozizuw.rf.gd/al_quran_karim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2aa7ffe-68b0-433a-93a7-4d34bd7ca731/dead_and_gone_t.i_ft_justin_timberlake.pdfIn PDF document text
    • http://suvokejixu.epizy.com/luxijonilabowuki.pdfIn PDF document text
    • http://widabuve.epizy.com/chuyn_nh_dng_sang_file_nh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79d6399b-5b37-47de-bbdd-2dae605364ac/what_is_progressivism_educational_philosophy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d7f1b03-df2f-4135-b9ed-c8ff4df76068/jabra_cruiser_2_manuale_italiano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3c9dc4a-1a01-4176-94ea-6d7808e71af7/edtpa_task_3_special_education_example.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/diary_of_wimpy_kid_deep_end.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/52032363903.pdfIn PDF document text
    • http://piwirapofo.epizy.com/65013471273.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef960bc6-fbc6-4b5b-99d2-185f9e51834e/tiwipopetimutapinisal.pdfIn PDF document text
    • http://womejus.rf.gd/dark_green_color_background.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5db1e386-4c04-4578-b3cf-d6bd3db1f307/77037886746.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_off0000fe18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE18 6156 bytes
SHA-256: 9bd3ec4ec375bc590364582fd08db39b7f257db929829ab642f68f25294561e6
font_01_sfnt_off000112ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112ED 11196 bytes
SHA-256: e60392132b26f8f328760d25d6a469f8e9bf090740bd902f2c4820a6a82173c9