Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ec3030f4ac8a5e6…

MALICIOUS

PDF

84.3 KB Created: 2021-02-16 21:39:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: b927b9a90a0cfd0745e3cc50f4833b9f SHA-1: 955880d9671c221553ed54c39fbd9514a8b1951a SHA-256: 5ec3030f4ac8a5e672f727da6db19a96e886eb0695865c8da430d8e2a6543105
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are SEO-optimized and point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The presence of a download button lure and ClamAV detection further supports a malicious classification. While no scripts were explicitly extracted, the PDF structure and extensive link farm suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/wix?keyword=asus+sabertooth+x58+drivers+windows+7 PDF link annotation
    • https://dolilufaxeni.weebly.com/uploads/1/3/2/6/132683246/tabaxetevepaso.pdfIn PDF document text
    • https://cdn.sqhk.co/junizafuzep/jhhdifY/gatebokadowaja.pdfIn PDF document text
    • http://prizinsta.site/answering_service_companies_cincinnati3x1o2.pdfIn PDF document text
    • https://jupepirime.weebly.com/uploads/1/3/4/3/134313464/najixefifemabuw.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/ghjhIDG/zulavu.pdfIn PDF document text
    • https://cdn.sqhk.co/jukusenefow/0ghhdT7/mi_launcher_app_download_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/zujijivopuju/nfJjfba/vikings_war_modded_apk_android_1.pdfIn PDF document text
    • http://artdebug.site/9900678672713m6m.pdfIn PDF document text
    • http://3gusevshop.website/cambios_sociales_en_el_embarazojwfxh.pdfIn PDF document text
    • https://cdn.sqhk.co/doxanusubomo/kd3iija/amazon_seller_central_customer_service.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/gcRNifM/venologibixabaderevepo.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/liluvad/24552611064.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/kepitunolu.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/bloodsport_2_hd_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/3774146426.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_off0001055a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055A 5628 bytes
SHA-256: 3a2bf9a8ee06b253a5afe66c40195560da64ff7606ffe645f515f6b3576155b9
font_01_sfnt_off000118a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A3 13336 bytes
SHA-256: dd77280905e90fb3fb3f695cf18803a7a3abcc0ec026b2a7f9a91fcb07afa65b

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