Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d22269996b93509…

MALICIOUS

PDF

78.7 KB Created: 2021-03-16 09:15:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 56be0fe7817bc2fc82115c1679407b0c SHA-1: 9a317226437596c6c8c801fb4cdd579bac061c44 SHA-256: 3d22269996b935097ab69549c53bba7f0b5aa56bd7ac78dfb4898c952f2e3eb9
126 Risk Score

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 0.9950

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://midufefew.ru/wix?keyword=rat+dissection+worksheet PDF link annotation
    • http://biwedujurar.mywebcommunity.org/machine_availability_calculation.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/kGhiYGa/transfer_paper_for_wood_carving.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368471/normal_6045fc3191cff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5fdc57bcc55c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372681/normal_600efd822bb7d.pdfIn PDF document text
    • http://vebifitapex.mypressonline.com/vufeturokulakad.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/kizuvu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379035/normal_6011e72200ac0.pdfIn PDF document text
    • https://cdn.sqhk.co/miloxuso/ghg7Wji/arena_football_video_game_xbox.pdfIn PDF document text
    • http://zonetufe.iblogger.org/25408455620.pdfIn PDF document text
    • https://cdn.sqhk.co/rilaraviror/hjBgcke/selena_tips_mobile_legends.pdfIn PDF document text
    • https://cdn.sqhk.co/dekaroku/jeewehg/4436378556.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462678/normal_603ce9f3da4e6.pdfIn PDF document text
    • https://cdn.sqhk.co/miwizawi/JNhihhV/besojixugemuru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421478/normal_604aecb19d56a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456676/normal_60490abda253a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479223/normal_601b0f474a7d0.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/how_to_program_rc_remote.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/tawovojo/febokidawabofot.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/sublime_text_code_formatter_json.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/schma_anatomie_du_coeur.pdfIn PDF document text
    • http://karimelu.rf.gd/figutumadad.pdfIn PDF document text
    • http://jaxifepuxebadin.epizy.com/mobejarunowaja.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/lekiditagakevesepumob.pdfIn PDF document text
    • http://difedomuki.epizy.com/further_maths_equation_sheet.pdfIn PDF document text
    • http://xovefopu.myartsonline.com/inductive_and_deductive_learning.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/50698772887.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_off0000e8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F9 4948 bytes
SHA-256: d9f405fd4845d480af71205670fd6d9a9c1b6526914cc77b8066fc86c0637682
font_01_sfnt_off0000f9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CC 10996 bytes
SHA-256: ee6e205368c192952b5a673e073453a7821496019b46df373f64e5bc9b0f190e
font_02_sfnt_off00011f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f