Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed1d83a61518c5c…

MALICIOUS

PDF

153.8 KB Created: 2021-06-02 10:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8d2a13fbfd0e5d452c19a6cbec418ca6 SHA-1: eaac0125a733da675c3d17270cd7975368bfe9cb SHA-256: eed1d83a61518c5c8afccafbd64048539108f25081fa9abf5b454bd057a65880
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 0.9976

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://zajinet.ru/123?utm_term=rajakumara+kannada+movie++in+tamilrockers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379744/normal_6063cd5a5882a.pdfIn PDF document text
    • https://vatozuserivowi.weebly.com/uploads/1/3/4/3/134385792/3398186.pdfIn PDF document text
    • https://kelonefak.weebly.com/uploads/1/3/2/6/132683111/8341264.pdfIn PDF document text
    • https://bosizeke.weebly.com/uploads/1/3/4/5/134596703/8aa353b607de0.pdfIn PDF document text
    • https://borojixupoluba.weebly.com/uploads/1/3/5/3/135316148/7514704.pdfIn PDF document text
    • https://namonizumus.weebly.com/uploads/1/3/4/3/134345036/lujupalopewejo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390330/normal_60029d7f4b49a.pdfIn PDF document text
    • https://xoxisutebigag.weebly.com/uploads/1/3/1/4/131453062/vexebutotisenif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424682/normal_5fc732d531108.pdfIn PDF document text
    • https://jegobagugixados.weebly.com/uploads/1/3/4/8/134858953/03f1ac8094c1cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454808/normal_606adaf9df916.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408703/normal_6063ac21e1459.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144411741/fubebomeperoxavapitib.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/kadasexugaban.pdfIn PDF document text
    • http://sijomirurefi.pbworks.com/w/file/fetch/144451995/16951429153.pdfIn PDF document text
    • http://kolasotosexu.pbworks.com/w/file/fetch/144414648/biruponozemagikoz.pdfIn PDF document text
    • http://wijozuzapusa.pbworks.com/w/file/fetch/144437046/beyblade_burst_turbo_episodes_watch_online.pdfIn PDF document text
    • http://kevuxezedila.pbworks.com/f/super_smash_bros_how_to_unlock_all_characters_fast.pdfIn PDF document text
    • http://zekodunu.pbworks.com/w/file/fetch/144450204/daru_badnaam_kar_de_dj_mp3_song_free_download.pdfIn PDF document text
    • http://palixazoke.pbworks.com/w/file/fetch/144427254/como_hacer_autos_con_cajas_de_carton_para_nios.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001c898.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1C898 32288 bytes
SHA-256: 16b88567d68088cc6b480ed7e42372c4997caa97096c52058005eabf3af4234f
font_00_sfnt_off0001b69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B69D 5292 bytes
SHA-256: 3ab800048f56fcbc037463bf34f7c3ccd9139fbf77beee6f09025b61805a5333
font_02_sfnt_off00020426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20426 12116 bytes
SHA-256: 1eb8225fd7766319567a9dbc2278166b1df9767256be11253fa54980e0fad53a
font_03_sfnt_off00022c62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22C62 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e
font_04_sfnt_off000241b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x241B3 6484 bytes
SHA-256: ca306a182725144ca652bd5da54d6e00ffacec83703caacd889f6d2c01a9d480