Malicious PDF — malware analysis report

Static analysis result for SHA-256 05c55a0c57b063ec…

MALICIOUS

PDF

77.7 KB Created: 2021-03-25 08:33:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c6f6bb7d1a1eac4912ec9b78b48f4c30 SHA-1: 9d5b8384fa22060afe750ce479d6c58c3e7fae3e SHA-256: 05c55a0c57b063ec33b70b3e1d9d25a1f01721a6fe586d9faf1e21873f393cfb
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 0.9991

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://kuzutuzo.ru/wix?keyword=battlefield+1+plane+guide+black+bess PDF link annotation
    • http://junumidutuzakox.getenjoyment.net/amoeba_sisters_video_recap_of_mutations_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/C4TjiEk/sipivefojixazewa.pdfIn PDF document text
    • https://pavovebowejimop.weebly.com/uploads/1/3/1/6/131607108/bfd4395a5decb4.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/geramopafibozatonivevifef.pdfIn PDF document text
    • https://bobujiwa.weebly.com/uploads/1/3/1/0/131070874/4c29e197.pdfIn PDF document text
    • https://pudisemibupar.weebly.com/uploads/1/3/4/0/134096773/nufovutopezuwerepa.pdfIn PDF document text
    • https://zukigepuzena.weebly.com/uploads/1/3/4/5/134593101/372114.pdfIn PDF document text
    • http://sogejovep.mypressonline.com/zapaxozasuzupowotaw.pdfIn PDF document text
    • https://tirokaroxere.weebly.com/uploads/1/3/2/7/132740449/virokef.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/jf4Qhhg/18246312147.pdfIn PDF document text
    • https://cdn.sqhk.co/votawusebak/Zijhfhj/sailors_gang_wainame_audio.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/do_elderly_qualify_for_medicaid.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/jimugivos/best_pic_editing_app_for_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/guia_cancer_de_tiroides.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/foxigudarilipazof.pdfIn PDF document text
    • http://vekemelegewimo.atwebpages.com/jafagitan.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/2400145079.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/xowofanaburegifezu.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/jaxugametudu.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/vintage_bose_901_speakers_ebay.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/bafotiwakugazevodogazaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/sigedirukosonebujegokateg.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/early_civilisations_worksheets.pdfIn PDF document text
    • http://weponigonimogo.myartsonline.com/35815605857.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 8

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_off0000f2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B9 5532 bytes
SHA-256: 893543ae9e275faf2d547ee6315cacabe981cb1a1cf820cdbd5c30fbdb756ea2
font_01_sfnt_off000105a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A7 10368 bytes
SHA-256: 71e338a2faec98f2cf06ffae465dd9c501524258957972416929fe063ee11028

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