Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca636a361f94aa89…

MALICIOUS

PDF

84.7 KB Created: 2021-01-04 02:07:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bebf2c2744116d95838bf0e186f3dbed SHA-1: e04616a291c6920096dead63693efbbeaf9d4547 SHA-256: ca636a361f94aa89010dbbd3943b64a92b78d593e5dbaf8357629e5ed2c277d6
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to Weebly and CDN domains, suggesting a link farm or redirection mechanism. The embedded URLs are likely used to download second-stage payloads or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffnew.ru/aws?utm_term=arya+movie++in+telugu PDF link annotation
    • https://radamokugek.weebly.com/uploads/1/3/2/6/132696621/588af.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/jifhhp3/archer_season_11_episode_5_imdb.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/NghP61Q/matrix_live_wallpaper_for_pc_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vemonososepa/ijicibn/magic_piano_pink_tiles_music_game_descargar.pdfIn PDF document text
    • https://kunoloxudiruk.weebly.com/uploads/1/3/4/7/134767428/tivavuru.pdfIn PDF document text
    • https://zofigaxukinepir.weebly.com/uploads/1/3/4/2/134235574/mabojuwiwijunukiku.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/gf0gehi/87981541579.pdfIn PDF document text
    • https://gowosupene.weebly.com/uploads/1/3/4/4/134489802/95b21b3e.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/Righgbo/59258485218.pdfIn PDF document text
    • https://nipetetoxijekuj.weebly.com/uploads/1/3/4/7/134718304/2ad0813b4a9332.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf0ad254-d028-4f0d-bf97-1989fb3e7a46/101_ejercicios_para_aprender_a_puntu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c12ecc7-7ba4-455e-b066-3abb741973b9/81238529848.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_off0000eaea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEA 4976 bytes
SHA-256: 5f4eab58fbdeb279864f0907108c5ce6af7fd5490ad868c0277ffbbe4dca3810
font_01_sfnt_off0000fbce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCE 4168 bytes
SHA-256: 55072b0ba97f71d55a0babde4770084d0f11f358d335990609306fa4d180e166
font_02_sfnt_off00010b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7A 10648 bytes
SHA-256: 9022270d150015ac206e2a0410b4ebacbcb12703349fa8e8ef0363d2cb75e971
font_03_sfnt_off0001303e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1303E 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6

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