Malicious PDF — malware analysis report

Static analysis result for SHA-256 61ce21e8f2de8dfa…

MALICIOUS

PDF

78.4 KB Created: 2021-03-14 23:22:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c9f709dba39c11906d5156e3ef5445ce SHA-1: 5ffb9e3e1e8ba402e4997f57875cc251ac9476ab SHA-256: 61ce21e8f2de8dfaf4a9eeab90b8d9dad85ccd26eefebd47c147351800ce2642
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9990

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://vilenefex.ru/award?keyword=africa+map+pdf+free+download PDF link annotation
    • http://vojakebuniseti.22web.org/wokukibojebepopigabe.pdfIn PDF document text
    • http://vosusapar.22web.org/electronic_battleship_advanced_mission.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b94bbdc-69d3-41a1-aeb8-a85612ea500d/84625969803.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/facebook_black_background_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/cerwin_vega_lw-_15_manual.pdfIn PDF document text
    • http://sogigadataga.epizy.com/laruda.pdfIn PDF document text
    • https://30383b9b-b26a-44f4-9a26-03873af8f03c.filesusr.com/ugd/fdee49_a59dee73179348d6a66901c8615c5d73.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eca6a87c-6539-4c70-9ced-2b1baf3ef609/how_to_repair_pvc_sprinkler_line.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/tegogufamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e6bfa67-a103-4ad4-8091-8e316f903c48/loxezipagolisofonaluto.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/guide_diversification_alimentaire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a7711fa-60f1-41e5-873d-53d4a9dee257/blender_animation_tutorial_youtube.pdfIn PDF document text
    • https://3c2b787d-8465-4662-bdcc-bf736d584291.filesusr.com/ugd/8760e7_3650a85d41674935a5778c7a06960dd2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/76011082977.pdfIn PDF document text
    • http://soxosodazafu.epizy.com/kajivisitip.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/tetemuvalenisuwakumawide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb97afc7-1794-4b70-bc99-99fcb786ee71/40163355192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6540641d-2c98-4fed-a7c4-85159b27c034/comfort_aire_ductless_air_conditioner_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/asus_transformer_book_t100ta_boot_from_usb.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/aspectos_da_aprendizagem_motora.pdfIn PDF document text
    • https://5984e891-aecd-43e6-866f-efdb297c9c35.filesusr.com/ugd/403565_e55a00e0b9124b07afb362ecf9ceda10.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e49e11b-06b8-4e6c-a31e-367b0dce7df8/milpersman_1306_spouse_co.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/how_to_install_graco_size4me_65_rear_facing.pdfIn PDF document text
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_4d90746e4c3c4bb7ac3be996fdac0649.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e655336b-a212-493a-b56e-4b036dd3c29e/the_lion_the_witch_and_the_wardrobe_book_1.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF669 5204 bytes
SHA-256: 58af2cccb0d571298aceb1bb8beacbddd04e4478d0a92008df5a64628556a24d
font_01_sfnt_off0001081c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081C 10448 bytes
SHA-256: 853761b297a4f44217010ba94c444a129f8c6be7e959a556182abbcc3887755b

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