Malicious PDF — malware analysis report

Static analysis result for SHA-256 3271fc473b301b23…

MALICIOUS

PDF

76.4 KB Created: 2021-03-31 02:10:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ef1294406368a05a2878001970fb4946 SHA-1: 547c33da42671305c3682c8a5f7f14170bde6b24 SHA-256: 3271fc473b301b236a9fad6394d753c82413e2ac9f61bee2d92e4f8aae9da04f
194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fokemale.ru/award?keyword=anatomy+trains+3rd+edition+pdf+download PDF link annotation
    • https://kowumawadixowiv.weebly.com/uploads/1/3/4/8/134888970/puwulawiluvotutip.pdfIn PDF document text
    • https://lipemegovaw.weebly.com/uploads/1/3/4/7/134766771/rotoxisipusaxu.pdfIn PDF document text
    • https://zazuxari.weebly.com/uploads/1/3/4/3/134319397/6582252.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481515/normal_5fe23b0774a18.pdfIn PDF document text
    • https://noxajigaja.weebly.com/uploads/1/3/4/6/134698193/4524968.pdfIn PDF document text
    • https://karawabinu.weebly.com/uploads/1/3/1/4/131453718/tijevomisisekepibam.pdfIn PDF document text
    • http://fetedeju.mygamesonline.org/41822890538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386094/normal_601a643f19c2e.pdfIn PDF document text
    • http://tasiperop.medianewsonline.com/joxorokotiziz.pdfIn PDF document text
    • http://leririv.sportsontheweb.net/39243449947.pdfIn PDF document text
    • https://kijapadawoli.weebly.com/uploads/1/3/4/9/134900431/b5ce132.pdfIn PDF document text
    • https://menedufigejit.weebly.com/uploads/1/3/1/4/131482930/wivimenuwibuvowivewa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_603a45e465291.pdfIn PDF document text
    • http://xufikefizot.sportsontheweb.net/fifetowididirekidaxivexav.pdfIn PDF document text
    • http://wildber.store/linksys_e1500_firmware_dd-wrt8zj09.pdfIn PDF document text
    • https://kuzogirig.weebly.com/uploads/1/3/4/7/134748708/2f44e68.pdfIn PDF document text
    • https://duverovimuvojap.weebly.com/uploads/1/3/4/1/134131352/mofejiv.pdfIn PDF document text
    • http://dadosib.22web.org/15165153450.pdfIn PDF document text
    • https://fuwexizadosilu.weebly.com/uploads/1/3/5/3/135318643/rematuzonasala_mosan_pijilomujiwulas.pdfIn PDF document text
    • http://cyberlife.store/65450528683u21xs.pdfIn PDF document text
    • http://salearea.pro/xukivepuxakivawwhu06.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rikilusidarule.rf.gd/59686403401.pdfIn PDF document text
    • http://fepetixapokurob.myartsonline.com/jagujunujevevisexiwuxo.pdfIn PDF document text
    • http://walorute.rf.gd/88720405862.pdfIn PDF document text
    • http://fuvogixerad.epizy.com/blue_white_screening_method.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_off0000ea57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA57 5532 bytes
SHA-256: f996b51f6b0c17c16ba8174f8681ce30fea7adb102558c7151accf7a6a29b2e4
font_01_sfnt_off0000fd2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2C 11328 bytes
SHA-256: 7c89cf215d9ed05a0039f3f29111baabdb601db5059e3eaf0cbd405b0d0fabaa