Malicious PDF — malware analysis report

Static analysis result for SHA-256 c18ddab668b79dc9…

MALICIOUS

PDF

77.2 KB Created: 2021-03-30 17:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ed9891f57bd080ac2d7b7ab7fed5470a SHA-1: ee7a2de8cab7ca2546a01cd338bacaf8728dc8bf SHA-256: c18ddab668b79dc990c1bed58a069bc561c61365482b17e593050243f317acc2
156 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 0.9996

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 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.
  • 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://mezovuduw.ru/wix?keyword=chinese+cinderella+summary+chapter+1 PDF link annotation
    • https://pilonalamajavex.weebly.com/uploads/1/3/1/1/131164122/wefaxegikakomu.pdfIn PDF document text
    • https://cdn.sqhk.co/pusobatosip/ghhfhhX/lolilijeburan.pdfIn PDF document text
    • http://itayoga.space/reporting_anova_and_post_hoc_results7rrlg.pdfIn PDF document text
    • https://cdn.sqhk.co/gewanunu/ghzgjji/50989520853.pdfIn PDF document text
    • https://negamevetafe.weebly.com/uploads/1/3/4/4/134439480/vezis_zimijorefob.pdfIn PDF document text
    • http://sfr-espace.best/treasure_island_books5ein.pdfIn PDF document text
    • https://cdn.sqhk.co/kuxaroposa/iioFbjc/karakter_kryssord_7_bokstaver.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/dWgi953/idle_mine_crusher_tips.pdfIn PDF document text
    • http://namedaun.fun/87884879067p63fi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tugafebip/android_tv_remote_control_apk_pure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf1d5be9-66ff-44ae-a7c9-b78f8b3fdacf/hunter_fan_remote_not_working_for_light.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/little_prince_movie_vs_book.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/lg_sound_bar_model_number_sh2.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/cash_book_and_ledger_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/binojerekosakupewugenesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65492acb-e354-4da6-9e9d-51e817bb57c8/sawakozorixemifakumuponu.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/principles_of_microeconomics_chapter_15_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/guess_how_much_i_love_you_fabric.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/clair_de_lune_guitar_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/34415918029.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/pusegovawomewodubar.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_off0000ee53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE53 5372 bytes
SHA-256: 84773de08ced5163b529d32df219e73a7a246a637d30b07145b86b75599779c7
font_01_sfnt_off00010073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10073 10940 bytes
SHA-256: b7047f2c9feee120f2c26a8d4aacb10b33f061e374877b38ae1ac612605c3979