Malicious PDF — malware analysis report

Static analysis result for SHA-256 55d3b9d886b0651d…

MALICIOUS

PDF

79.0 KB Created: 2021-02-13 08:38:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: be875d2de69c53d7cfda4eba1b711173 SHA-1: b03989904d27511c425f7af180c5d8175340cea5 SHA-256: 55d3b9d886b0651d1ed66af9d24d1534a2bbcc5cfa587b45728cb91f61e1be4e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains embedded URLs that lead to external websites, one of which is a "riot point generator" lure. The PDF structure also suggests it is part of a link farm, likely designed to distribute malicious content or phish users.

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://bologen.ru/wix?keyword=riot+point+generator PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485935/normal_5ff3a01134337.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381762/normal_5fe8072897202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368956/normal_6013892b58de8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374700/normal_6002b5bd3eeb2.pdfIn PDF document text
    • https://narosixepitifon.weebly.com/uploads/1/3/5/9/135960882/lizuv.pdfIn PDF document text
    • https://biwawabagukolaz.weebly.com/uploads/1/3/4/7/134730268/sinidokomogu.pdfIn PDF document text
    • https://tinabatof.weebly.com/uploads/1/3/0/7/130776088/lejegat-vubuvaxuf-gatolu-sawike.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/dekogamik/havoc_brothers_tamil_album_song_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/ladopoporefutokawaz.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/sea_of_thieves_error_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/68386787006.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/41075171713.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/adding_subtracting_integers_worksheet_7th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/wewazuzagoki.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/i_cavalieri_dello_zodiaco_scan_ita.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/theeratha_vilayattu_pillai_songs_starmusiq.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/android_10_update_issues.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/mariam_khan_reporting_live_serial_sad_song.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/42139910659.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
    • 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_off0000d77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77B 2984 bytes
SHA-256: 82c84ae5d629ebb1785ea8f4b17c1317561d86a260b8a93bb8c0017d3037a5f2
font_01_sfnt_off0000e22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22A 4784 bytes
SHA-256: d09d4a94a6e816390ddbb857183c90374a17a30367ccfe97cf77d0afa22b5b95
font_02_sfnt_off0000f286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF286 11064 bytes
SHA-256: 6964ae51f8398e697b4a3fbe743009a5a72f9f472484e1abe1af28d1aff4f08b
font_03_sfnt_off0001189d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189D 16252 bytes
SHA-256: 675ad90a1ed97770d48bde5b406a4a528564db992b6ab4ce9e6baf05563b26bc

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