Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6d92da5cf7694d…

MALICIOUS

PDF

87.9 KB Created: 2021-03-25 14:16:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 73a961ac0de190904e47be2185d8cc69 SHA-1: e6142e0ad7577b087c83240f27b2098376ee388a SHA-256: dc6d92da5cf7694d88b9668596212e8bacb653c406e82c75eba9449dc85c1402
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 0.9919

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=ragnarok+m+eternal+love+critical+assassin+guide PDF link annotation
    • http://zowogusatutojus.mywebcommunity.org/zitixos.pdfIn PDF document text
    • https://cdn.sqhk.co/miwavilusaji/hcheLgj/unreal_sandbox_download.pdfIn PDF document text
    • http://buzajusefuzasi.22web.org/24055881472.pdfIn PDF document text
    • http://pewekelexu.mygamesonline.org/wukuvubujaluteruxujasefex.pdfIn PDF document text
    • http://tokudujadi.medianewsonline.com/14057648392.pdfIn PDF document text
    • http://ruwemipuwev.mypressonline.com/how_often_do_cochlear_implants_fail.pdfIn PDF document text
    • http://sewukagazub.mypressonline.com/high_school_biology_textbook.pdfIn PDF document text
    • http://pufivuziviv.mypressonline.com/zetudorizukafitukidukiw.pdfIn PDF document text
    • http://levitajagukog.scienceontheweb.net/academia_vampirilor_6_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/ChJqhfz/maxeruzigijuk.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/susasugo.pdfIn PDF document text
    • http://romakipojaxu.mygamesonline.org/jimot.pdfIn PDF document text
    • http://mimisijuz.mypressonline.com/32390794860.pdfIn PDF document text
    • https://cdn.sqhk.co/wolebiduju/gjjiehc/58870680310.pdfIn PDF document text
    • https://cdn.sqhk.co/saseponirifa/ejhQhdL/zonekitimuvijo.pdfIn PDF document text
    • http://murimubijejaba.mygamesonline.org/sonitikedopibe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://resaruxowepu.epizy.com/palmistry_full_book.pdfIn PDF document text
    • http://jujabezemaluwe.rf.gd/alone_together_lyrics_the_strokes_meaning.pdfIn PDF document text
    • http://fapisab.rf.gd/pezerevatamibuvi.pdfIn PDF document text
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_4ec867ad47e94af7b6084c356a5d5966.pdf?index=trueIn PDF document text
    • http://xiwozoget.atwebpages.com/ditofojafajuteludapixudoj.pdfIn PDF document text
    • https://1fd079ea-3156-4ae8-a0b4-6153e0b529c5.filesusr.com/ugd/e66bf7_f85ec22f1d2144969146bbe27271d243.pdf?index=trueIn PDF document text
    • http://bupozefi.epizy.com/igcse_maths_revision_worksheets.pdfIn PDF document text
    • http://redifigikutusoj.myartsonline.com/free_printable_bible_word_search_puzzles_for_adults.pdfIn PDF document text
    • http://pabotojixupi.atwebpages.com/fuwamiza.pdfIn PDF document text
    • https://96ea5dd8-6962-4d57-b29c-fb233a715e3b.filesusr.com/ugd/ac3463_8880d1a9fa97458aa1caf1bbb65166ad.pdf?index=trueIn PDF document text
    • https://8d59741e-369e-44be-b01e-8fbcb09d2d01.filesusr.com/ugd/7cefa9_f721d73140df4ace8e387a59624b8a1c.pdf?index=trueIn PDF document text
    • https://804b95bc-9ca4-448d-a094-5a8e1ff69a26.filesusr.com/ugd/99d1da_e8ecebb97ee44a0591f50417c39698a4.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f19f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19F 4152 bytes
SHA-256: 0e6699b47cea33da49e571c7f7f766d3593b3979572b3c907b1da67b1773346d
font_01_sfnt_off0001002f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002F 5392 bytes
SHA-256: ecf71334291631cbdb69ed47454a944b6d63577fc697d1f555e17332f3b1cc2a
font_02_sfnt_off0001127e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127E 11836 bytes
SHA-256: 9263747387f848b96ed03e94b9b5b8c8308964737b7aa526f9587de5726ffc86
font_03_sfnt_off00013a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A4E 16448 bytes
SHA-256: bbc8a377ea308525ea4a093a1cfbcbef18081e68dbc1dc7ef94177a4c93541e5