Malicious PDF — malware analysis report

Static analysis result for SHA-256 b513fe668287b1f7…

MALICIOUS

PDF

76.9 KB Created: 2021-03-31 11:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3403d66c792848ac517e76884b2c98fc SHA-1: 74d0a779614fde06ba1c67b074f1f1cc92f8eaf1 SHA-256: b513fe668287b1f702472aac8b666d9f76e541750b98013a112b62836e6305e8
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 0.9991

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://xajibur.ru/strik?utm_term=gopro+hero+3+battery+pack+charging PDF link annotation
    • http://spacexfoundation.net/personajes_de_la_obra_edipo_rey_y_sus_caracteristicas42gv4.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/hhgc4ii/47877683731.pdfIn PDF document text
    • http://vipmanmarket.space/fudozoropuzesiwiduri0wrmp.pdfIn PDF document text
    • https://cdn.sqhk.co/gijosevozu/gjgUQtv/knock_down_frame_vs_welded_frame.pdfIn PDF document text
    • https://cdn.sqhk.co/gonuromabime/je6igSu/history_of_halloween.pdfIn PDF document text
    • https://cdn.sqhk.co/jaguwubax/iLhfic3/white_noise_generator_office_ceiling.pdfIn PDF document text
    • http://oneplusonemain.xyz/vedidedeay0hu.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/pdf_editor_free_online_download.pdfIn PDF document text
    • http://runojiwum.getenjoyment.net/toro_gas_weed_eater_wont_start.pdfIn PDF document text
    • http://vakiduweg.mygamesonline.org/activity_based_costing_kaplan.pdfIn PDF document text
    • https://cdn.sqhk.co/girasufu/gcNIchd/32507755018.pdfIn PDF document text
    • http://bluebadgeapproval.com/full_marks_guide_class_9_englishdjyub.pdfIn PDF document text
    • http://merovew.xyz/tanaro9e4vn.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/sojenozap/41977157901.pdfIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_1dde916cc6c94106b44943bca7f51019.pdf?index=trueIn PDF document text
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_1d0dd1ffe0fc4dd18e8b9e5239f9091d.pdf?index=trueIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_a4b82cf1ce3b40b39839cacc191c16b7.pdf?index=trueIn PDF document text
    • https://9170d309-caca-4186-8987-bf6b40ce219c.filesusr.com/ugd/baef12_f32b3e3e075748068a8028b7470ceb57.pdf?index=trueIn PDF document text
    • https://37cc4ef3-276f-49d0-84f3-8bc08bbde6a9.filesusr.com/ugd/e4a5d4_edee8e1b679a4f43a08fec8787ab1813.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jijari/apple_tv_netflix_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/30506116843.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/22060709358.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/3d_mirrorpic_photo_editor_apk.pdfIn PDF document text
    • http://nodikaduf.onlinewebshop.net/learning_american_english.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC8 5488 bytes
SHA-256: d38902e5954279ebb12d64efa2cc3741e9ec6593111cee0d191c278b3baa7ff1
font_01_sfnt_off0000ff7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7A 11272 bytes
SHA-256: ff81dc3211b0357b5227f714fbf341ce72437ea5a2d0fefbe4eaafda973fc091

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