Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ace2dd68e9b5e86…

MALICIOUS

PDF

92.1 KB Created: 2021-03-21 00:06:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e56b113bda90475dbbab11631ff22200 SHA-1: 72255f0f2e0e78d93aea05291634b257ec03398a SHA-256: 6ace2dd68e9b5e862a1eb930c51e334c5db24a1d1a31b166cd7fd78e11e430d3
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 0.9975

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://nipisod.ru/123?utm_term=kadhal+kadhai+full+movie+hd PDF link annotation
    • http://fafabil.getenjoyment.net/fmea_handbook_aiag_vda.pdfIn PDF document text
    • http://xafawotilujos.mypressonline.com/nesasi.pdfIn PDF document text
    • http://vevovifox.scienceontheweb.net/how_to_find_element_tv_model_number.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466379/normal_5fd191fc1b05d.pdfIn PDF document text
    • http://jebebixazonutug.mypressonline.com/61504027740.pdfIn PDF document text
    • https://cdn.sqhk.co/benadujeju/bP9Kjbm/46946860220.pdfIn PDF document text
    • https://cdn.sqhk.co/sunalikefazo/9VLgfQd/96438481020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416504/normal_5ff58c5c3f0be.pdfIn PDF document text
    • https://cdn.sqhk.co/vovigewuva/jbrnjif/bonobuvevuroxibesedutir.pdfIn PDF document text
    • https://cdn.sqhk.co/vemoderama/UiVueFr/marine_corps_scout_sniper.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/gThdgeb/line_puzzle_tantan_aplikasi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427501/normal_5ffa71393f05d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502817/normal_602126686f5d7.pdfIn PDF document text
    • http://bojidodug.iblogger.org/evertale_ios_guide.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://zaveravezujob.epizy.com/westlife_hits_free.pdfIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_e25a220d4b504e608a33099e52138c54.pdf?index=trueIn PDF document text
    • https://662517ce-f374-4037-aebd-99b1dbe00103.filesusr.com/ugd/0c4177_af7a09cd6ad14003aa43f7c5de5bed68.pdf?index=trueIn PDF document text
    • https://0ea28b16-58c2-472d-b6be-3e97fe9b7bb6.filesusr.com/ugd/696b8a_cacdd751cbfc4d989674bb2334f04e53.pdf?index=trueIn PDF document text
    • https://2ffa788b-df2f-461f-b9c5-573bec542745.filesusr.com/ugd/374ce0_194e58d218bd4ec98c1276f27367a431.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/review_android_tv_box_tx3_mini.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/sawuzerij.pdfIn PDF document text
    • http://vugugemo.atwebpages.com/king_arthur_legend_book.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/80079191815.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/free_sample_sql_database.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_off000118f9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x118F9 3572 bytes
SHA-256: d878ad1eda93d8bff5998932762ff29f068b4f97138b684301e144a97064adac
font_00_sfnt_off0000f814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF814 4664 bytes
SHA-256: 0f60c42d46cb7066bdacc6d2f91e0291ad4ac8d2dc66400ef16f29dffccc6916
font_01_sfnt_off00010830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10830 4968 bytes
SHA-256: f7dea60553c48989e089fb69f966b717f525bdf43b724ea564f46e2a7d718b06
font_03_sfnt_off00012665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12665 11156 bytes
SHA-256: 04b238739badc0079ce11e8e01913cd70bd90243cb29692cfcfccf9b090e69a0
font_04_sfnt_off00014c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C66 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e