Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e1b3e8a3f25938f…

MALICIOUS

PDF

78.9 KB Created: 2021-04-30 17:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5a7ab0501862bafa5d801aa6215a4885 SHA-1: dd38f528d2d552944ee0c9ac06f48739846936ba SHA-256: 5e1b3e8a3f25938ff2f4b4caf340cb7de5301ee0bf4e0d4bea9a532bc7ff8934
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 0.9960

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 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://maypoin.ru/strik?utm_term=alcatel+fierce+4+google+bypass PDF link annotation
    • http://dowotezovemalo.mygamesonline.org/pepodeduxanuveta.pdfIn PDF document text
    • http://blockhcain.host/what_grade_level_is_matildaggwmz.pdfIn PDF document text
    • http://thepropheticapp.com/mosikupijovhy7gm.pdfIn PDF document text
    • http://plusstore.pro/87890696691n2c3h.pdfIn PDF document text
    • http://vseti.life/rikawugerufnk0k0.pdfIn PDF document text
    • http://reduslimitalia-oficial.site/design_flyer_online_free_templatearjl9.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/riwisinunepivom.pdfIn PDF document text
    • http://wivevemeb.scienceontheweb.net/how_to_use_zelle_internationally.pdfIn PDF document text
    • http://vodizurulenega.mypressonline.com/calistenia_rutinas_y_ejercicios.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://80b1f93a-fe74-4439-a81d-34814fa7a505.filesusr.com/ugd/e56fe2_74e67aecab1f4c66adc9387878e42702.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/809572cd-9b34-4cb2-ac66-76e4f9103564/what_time_does_the_stock_market_open_and_close_india.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/vopufitiwalupiximitepis.pdfIn PDF document text
    • https://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_0cd8db7d3b94467cb26d8e0c113864c4.pdf?index=trueIn PDF document text
    • https://665985ba-8e9f-4173-b993-17a3090d61d7.filesusr.com/ugd/08421c_85086f71df5e41ef90ecf4d57a7fead6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/bible_study_for_new_relationships.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/617dde82-d87b-487e-bd61-0212a5aeac65/solebojenewufoxamizugudun.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/zerodinoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61d22d09-6a7c-429a-86cd-3b2f88125b93/zesufemezoneja.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/21953982115.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/conscious_sedation_nursing_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/hidden_figures_soundtrack_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6f5e8b9-8922-44ef-9b4a-a2b2e0e63915/what_are_stanislavskis_acting_techniques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cc68a91-7f1c-431d-95dc-8dd06dfe4cff/zikosolejewisomiridure.pdfIn PDF document text
    • https://36425c1f-c329-48aa-845d-1f8252cb45c8.filesusr.com/ugd/01d500_99035b85de9a409a99827c94f8c908d8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wezukep/tofesudixovate.pdfIn PDF document text
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_128851a2c7df4cb88d13e2300673203f.pdf?index=trueIn 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_off0000f57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57A 5500 bytes
SHA-256: 04e50f9abd6722332fc99edf8d7527968e1c29d0cf9f53e21c940f9af605dbbe
font_01_sfnt_off00010852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10852 11120 bytes
SHA-256: 18e68f8aea128201f00702a59a9deeff464b95f90b17bf2ff84d0b79ebfaeede

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