Malicious PDF — malware analysis report

Static analysis result for SHA-256 51e3a83f451004c9…

MALICIOUS

PDF

85.2 KB Created: 2021-04-06 13:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: df5da089d17a8c940cb24429606b1f3d SHA-1: 94abc68149cc7380b2f10019461f73f710a702ea SHA-256: 51e3a83f451004c9a246faa316602d2b941e7571dab4ba707f8cf72e4962979f
156 Risk Score

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 0.9993

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://mezovuduw.ru/wix?keyword=pure+land+ap+art+history PDF link annotation
    • http://sedouche.xyz/the_way_of_the_master_study_guideed7x1.pdfIn PDF document text
    • http://agent-ritual495.online/singer_heavy_duty_sewing_machine_4432afnms.pdfIn PDF document text
    • http://kakorixow.mygamesonline.org/bunudazafeforisopo.pdfIn PDF document text
    • http://jakiduve.scienceontheweb.net/renewable_energy_and_other_alternative_energy_sources.pdfIn PDF document text
    • http://sifisomatexow.sportsontheweb.net/bodalotolezuzaxoduz.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/the_shah_abbas_milani_free_download.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/befafuni/97052866149.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/tajamimagujimebusozan.pdfIn PDF document text
    • https://b5d51143-f34a-4a4f-9265-6917490cb775.filesusr.com/ugd/9f69bd_e3107268db5e4b569e0deda84da5bb75.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/how_to_find_the_magnitude_of_the_gravitational_force.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/67526875395.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/xomesalaragoka.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/amazon_prime_video_on_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/annual_return_format_under_companies_act_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/when_can_you_disclose_information_without_consent.pdfIn PDF document text
    • https://e3055f73-6236-423b-b810-4bc1a15f300f.filesusr.com/ugd/fa12d1_a10d94c452194f5b984d9bcf93010f4c.pdf?index=trueIn PDF document text
    • https://36535336-4f9e-4c0a-b1ad-3385cb5d4299.filesusr.com/ugd/15ebe2_5a84710c227a48e989da974e88598a2d.pdf?index=trueIn PDF document text
    • https://1580f21e-fc75-4350-9669-3be8b7525729.filesusr.com/ugd/eff6cf_dc66bea77b734c27a1fa8babaf3062b2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/tv_guide_hobart_friday.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/rametodopur.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/how_to_clean_a_keurig_with_vinegar.pdfIn PDF document text
    • https://0fc0baf9-b884-4fcd-968e-f93c0f938930.filesusr.com/ugd/68ec51_fcb28731ddbc4513838113d41eea6a89.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fizup/i_wish_you_more_read_aloud_online.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/molecular_basis_of_inheritance_ncert_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/44600586979.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_off00010de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE3 5152 bytes
SHA-256: 277994bd9a6a2e9b9a73af58e52b322cdfb4cc969f45dc13e9c3de9ac0b97d98
font_01_sfnt_off00011f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F62 11712 bytes
SHA-256: cde5234b54f235e73ea8d19ef5a1103ea20e4bab8665b9bba9e75e03b660535b

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