Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b369e6da06c684…

MALICIOUS

PDF

84.7 KB Created: 2021-03-08 17:03:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c21f9724c50d23918b0cf2b0ac53a069 SHA-1: b0139ab51dc845a85224697dde941eb45fdd8ae9 SHA-256: c0b369e6da06c684f352c92330eb09892006eb4fb1c591188a7c679c5742303d
184 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to disposable domains and redirectors, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=envision+math+grade+6+pdf In PDF document text
    • http://lebadatow.22web.org/jar_of_hearts_glee_sheet_music.pdfIn PDF document text
    • http://selectgetc.top/usa_today_sports_nfl_predictionskzyg9.pdfIn PDF document text
    • http://jushq.club/nuwomameneguxasizodajufnbd64.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/ria1iep/jegadegomilododadupo.pdfIn PDF document text
    • https://cdn.sqhk.co/zokosofu/ngdTjj3/siwinapareduwimaz.pdfIn PDF document text
    • https://cdn.sqhk.co/gumoxixo/9gcicih/lalewawabunuv.pdfIn PDF document text
    • http://milesatel.mygamesonline.org/the_accelerated_learning_handbook_free_download.pdfIn PDF document text
    • http://jobware.pro/dekojidinedajivubidoaii2m.pdfIn PDF document text
    • http://gamedv.design/streamlabs_live_streaming_app_downloadvklpi.pdfIn PDF document text
    • https://cdn.sqhk.co/xawesani/xdjkjfS/opera_in_balet_ljubljana_labodje_jezero.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/nalege.pdfIn PDF document text
    • http://olivamebel.com/509702647703wyga.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
    • http://silimefepil.rf.gd/food_chain_worksheets_5th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29d6775a-ce0b-4d76-91c0-0fbb640094fb/ximesobaxisipuzujo.pdfIn PDF document text
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_8f909a38b17142c494296480926a7d89.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3596d17c-954b-40f6-a1ea-a543f7fdad19/taco_bell_toasted_cheddar_chalupa_nutrition_info.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/580feb3c-a9ad-4c94-9098-9cef13ae12a7/does_turtle_beach_recon_70_work_on_xbox_one.pdfIn PDF document text
    • https://2c9641c8-5874-4869-9b94-f1378e60aa6b.filesusr.com/ugd/efc1f6_8505d87da0894236a16fdaab6fcdbf74.pdf?index=trueIn PDF document text
    • http://xeregolipota.epizy.com/insulated_roof_sheeting_pricing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fba79f18-38f3-4144-bec4-a7d7f78b4ba8/sinipidowipuwida.pdfIn PDF document text
    • http://tifilow.onlinewebshop.net/how_to_strip_demi_permanent_hair_dye.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96259eb4-2fde-4ee9-9f12-fda34ff81902/www.bpsc.gov.bd_exam_date_2019.pdfIn PDF document text
    • https://61090d85-22e6-4724-b969-52a17785150c.filesusr.com/ugd/952c2e_6948b213c6ee44ad915e09d4e68f3c4c.pdf?index=trueIn PDF document text
    • http://memamawu.onlinewebshop.net/plantronics_voyager_legend_bluetooth_headset_schwarz.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE91 6416 bytes
SHA-256: 2a69545f8a9d104697b847a0f548493cbc920d2d91a2c508c9ca03512f8941e1
font_01_sfnt_off0000fe5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5B 5380 bytes
SHA-256: f1229aabbf874c09b9c77688e1af0972113df6b460d23ef7dcd1198a8c44c208
font_02_sfnt_off00011078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11078 11392 bytes
SHA-256: f36b0a7379fa90a0f1cf4569cdc677d4d53b3abcefab359c3228f2ad886ea093
font_03_sfnt_off000136b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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