Malicious PDF — malware analysis report

Static analysis result for SHA-256 609c5acf712f24e2…

MALICIOUS

PDF

81.7 KB Created: 2021-09-08 23:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 93d45d54224d22ecd1cae05bf1ea7009 SHA-1: d6d78af2d0f587cbc36909000904dd0efd6bc932 SHA-256: 609c5acf712f24e2a59607978bc24cee73ba175d7f0d7567287a0a92ab871749
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and exhibits characteristics of a link farm, with numerous external URIs pointing to potentially malicious content. The embedded JavaScript and the presence of compromised CMS upload links suggest an attempt to redirect users to malicious sites or download further payloads. The heuristic 'SE_LOLBIN_RUN_COMMAND' also indicates potential command execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://elskenecologie.nl/files/nuzarokimejupiwetij.pdf In PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/pivazituzeketalov.pdfIn PDF document text
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/78004205468.pdfIn PDF document text
    • http://qdcmd.com/data/files/puvilebaxurezoporuz.pdfIn PDF document text
    • http://www.portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/kawiwiwamikobutifugefegi.pdfIn PDF document text
    • https://cryptobasics.biz/uploads/files/semugesitomalozewijapu.pdfIn macro / runtime command snippet
    • https://licorne-hotel-restaurant.com/userfiles/file/45657437499.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/mararepokatuwijo.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210908111700.pdfIn PDF document text
    • http://dilimkebab.com/userfiles/file/44295906242.pdfIn PDF document text
    • http://haiannweb.com/uploads/files/54279322655.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/df9q52jsi1vip92qj07ddmlj46/kaloguxaz.pdfIn PDF document text
    • https://franchisefarm.franchiseharbor.com/files/files/59793163498.pdfIn PDF document text
    • http://valkexclusief.reviews/app/webroot/files/userfiles/files/gusisagemixiv.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/wevasebaturojasupovag.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/vubesuxuxirof.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/6s2bkrlr1qvgmb6a26412rtlrr/petuzozivelugok.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/palubilajujulenexot.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/498ec0b4efcc07b0690f691333c075c4/31524881093.pdfIn PDF document text
    • http://alfatreyd-mebel.ru/archive/images/file/vozapigodogesaguxaz.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/rejelaj.pdfIn PDF document text
    • http://sangtaoad.com/uploads/userfiles/file/dedanasutasusurugemenexo.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/1285513837.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/19amra1omuf7h9n4jh3epolm21/xisozuru.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/xixemevolalatomiwesu.pdfIn PDF document text
    • http://loadcell.vn/Images_upload/files/jibaxudikitorunakusi.pdfIn PDF document text
    • http://www.portofIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=view+saved+wifi+networks+androidPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B4 18500 bytes
SHA-256: 5858a010e2e3f7fec9ba893b22f1267768916e03301fbde1a0ada5010d4fc7cf
font_02_sfnt_off000120e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E8 10516 bytes
SHA-256: c55d193fbdcb1aadab3600c1d86b4c11b9cd544f704f52baec815a8de151bc8d

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