Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a89e92e1bff5f85…

MALICIOUS

PDF

76.3 KB Created: 2021-04-15 01:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7497468429bd636e47fcb483599f8271 SHA-1: 58bfd81b4f32d0a4f082d7eda6d51752dd5f7f19 SHA-256: 5a89e92e1bff5f8545b900d8a189856faa6d50562e1b38f6a51902f3fe8e9fe2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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 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://xajibur.ru/strik?utm_term=example+descriptive+paragraph+about+food PDF link annotation
    • https://cdn.sqhk.co/raguwubives/igiegdG/83430049412.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/je0ggW1/xesafaloguguwutasozomun.pdfIn PDF document text
    • http://nutejujaxi.66ghz.com/84157009514.pdfIn PDF document text
    • http://axacheat4.xyz/percy_jackson_1_full_movie_in_englishk39h9.pdfIn PDF document text
    • http://boevoenlp.com/ladudewopedasudarigunopefx9fdo.pdfIn PDF document text
    • https://cdn.sqhk.co/gumojitoxowu/aicx8hb/gowubojinodoxoditirop.pdfIn PDF document text
    • https://cdn.sqhk.co/gazegarov/ggjfqUH/twisty_road_app_store.pdfIn PDF document text
    • http://english-10.site/convert_excel_to_fillable_online_free1gvcq.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/hchjkji/98986909281.pdfIn PDF document text
    • https://cdn.sqhk.co/titesojijuko/cgfHjid/tonadepelilebebot.pdfIn PDF document text
    • https://cdn.sqhk.co/gevagedubop/jQQpibk/mechcom_3d_rts_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/redixebu/fhghboJ/85456057827.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/be452915-fa78-45d9-b5aa-beb5878801dd/cellular_respiration_lab_results.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cc03656-183f-4902-930a-d27a594b4d9f/29971403886.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2df3da8-54a9-4fa9-95e7-8e09f135b99a/one_punch_man_season_2_characters_name.pdfIn PDF document text
    • http://pizodixevefok.rf.gd/25378785257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d03e35a-bf67-4b5b-b197-f6e79a411efc/irobot_roomba_870_manual.pdfIn PDF document text
    • http://poxemibusap.epizy.com/area_of_polygons_word_problems_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16ebe7b7-c603-4c97-92d1-c39f0a0883b2/44221432365.pdfIn PDF document text
    • http://muvipifipu.rf.gd/78354113531.pdfIn PDF document text
    • http://bimixurelulufob.rf.gd/reading_comprehension_worksheets_grade_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e31cb12-f188-466a-a4b3-5e09c3cc8078/fakowusubefawava.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_off0000eca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA6 5796 bytes
SHA-256: b0362a9dbdca1528cf2320ab41346fed92e07713de6d67cc41747f7d0afa8fba
font_01_sfnt_off00010045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10045 10456 bytes
SHA-256: bc4151a0732ea6ba91b3e5e032f7bfe043d56e52d7673be71c0660b1f1c4187b

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