Malicious PDF — malware analysis report

Static analysis result for SHA-256 11445df9b7b54905…

MALICIOUS

PDF

80.3 KB Created: 2021-03-29 21:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 05c8c42351517487b04298d74897ae84 SHA-1: 720e08733fcfa16a1b213409c8c22ddc0ab2cf17 SHA-256: 11445df9b7b549056e5a1261278593950af279dd700f778ae4f4a43e0c8c5457
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 0.9996

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://maypoin.ru/award?keyword=asperger+en+mujeres+pdf PDF link annotation
    • http://heleogose.online/88377061668qfn6y.pdfIn PDF document text
    • http://igafnd.org/skate_art_3d_apk_downloaditplt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413563/normal_6010d5d6d0295.pdfIn PDF document text
    • http://itawegan.space/zafopejuxoxejuz0er69.pdfIn PDF document text
    • https://cdn.sqhk.co/funixatugesi/b7fhihB/rugby_league_20_game_download.pdfIn PDF document text
    • http://hookup154.fun/the_competency_trait_perspective_of_leadership_assumes_great_leadersfer54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425009/normal_604386cc4a5aa.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/pmHidic/kutekiju.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/dYVgfcl/xofaxa.pdfIn PDF document text
    • http://matroskin.space/adjunto_adnominal_exercicios_com_tirinhas_7_ano_com_gabariton2xef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452588/normal_5ff54bf5da6e5.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/l4gh6ta/88590645340.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/gjheSlv/25891494335.pdfIn PDF document text
    • https://cdn.sqhk.co/digipexula/cKfqiau/torerotidabibosijodanab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b5d51143-f34a-4a4f-9265-6917490cb775.filesusr.com/ugd/9f69bd_bb525dedd5b9453b8428d5449fadbd9c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jiwisi/what_does_an_academy_order_mean_on_instagram_stories.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/25289529088.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/dipevikexamomedubofepoxut.pdfIn PDF document text
    • https://7b9449e5-51e9-4a7e-81f5-8587c42320f9.filesusr.com/ugd/571bad_cd15662e6c0a47e8acf1947a0d8ca144.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bifamomove/sijuwodesipij.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/public_speaking_communication_skills.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 5

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_off0000fad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD5 5184 bytes
SHA-256: e3ab30bb242fcfcb6490c02d55b4816aba49ba93d53d361d38884e758a7741d6
font_01_sfnt_off00010c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6F 11624 bytes
SHA-256: 8571d0bd43e5f1e93b9008d269380b78b295addef1dcb79f8768ef79524da678

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