Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dc0d1f45119c542…

MALICIOUS

PDF

78.8 KB Created: 2021-03-30 17:26:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 289124f75d94f3f522c6b5b724adda89 SHA-1: 8c51fd171ccab00652ba6bddae2c13eeafa64b16 SHA-256: 3dc0d1f45119c5420768e077ba9ed89a633bd2fe3109606a0dac89e67c66f5db
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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 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://gimoguvi.ru/123?utm_term=firewall++windows+8 PDF link annotation
    • http://filozajerezabi.getenjoyment.net/canon_lide_300_datasheet.pdfIn PDF document text
    • http://xodaxedepapopox.mygamesonline.org/25193083030.pdfIn PDF document text
    • http://ketupepid.22web.org/gejaforukemovu.pdfIn PDF document text
    • http://mofirixubutibi.getenjoyment.net/solewoxojesiwefanixax.pdfIn PDF document text
    • http://worozoxiw.sportsontheweb.net/active_directory_services.pdfIn PDF document text
    • http://sajitalunaded.22web.org/ps3_controller_not_charging_lights_flashing.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/be134ae2-7651-4af0-97e6-741698068ce1/gubaxodujudasetigotibezef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63c7e799-b043-463d-bbc0-f2dc153aed7f/sony_dvd_player_dvp_sr510h_region_free.pdfIn PDF document text
    • http://jofikuv.atwebpages.com/10497689813.pdfIn PDF document text
    • http://bedipate.epizy.com/bncc_ensino_mdio_geografia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8daf2574-ff36-4167-8aaf-fded260a9b79/42534256847.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb069186-3705-4680-b8a1-38cbbecf8a82/asus_rt-n12_d1_n300_review.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/p90x_workouts_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12ce26d7-e7ff-4925-b496-6982d2d7cebb/88021671969.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e55a0e6-0c82-42fb-8d88-3d674dbdfd78/xfinity_x1_extra_box_cost.pdfIn PDF document text
    • http://lejiletuvasipib.onlinewebshop.net/why_my_briggs_and_stratton_wont_start.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6ed25ed-f86c-4a3a-ba0e-f073eaa3bb5a/fenomenologia_del_espiritu_frases.pdfIn PDF document text
    • http://virawumeritaxo.rf.gd/the_little_prince_soundtrack_free_download.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A1 4768 bytes
SHA-256: 6564a4f44b0c50897118ed4c36f7bda7e41d082b2a94bc7c980667d3a45d52fa
font_01_sfnt_off0000f9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D9 10744 bytes
SHA-256: 3814905f6dd61cc438422246bb47ad5721f33e0195825b48f08a1f506e0bfec8
font_02_sfnt_off00011eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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