Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eaf2d24d65dd2cd…

MALICIOUS

PDF

102.3 KB Created: 2021-09-19 15:01:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9255fbcbc7dc82d624226b0717e726e3 SHA-1: 6e11b91ca55a2b91b9a26746fb4e5678ed32b799 SHA-256: 4eaf2d24d65dd2cd560fc28f7a3dc2a88c96e13c7111623d2a2637a3dca8afe4
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous external links, many pointing to compromised or disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • 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.
  • 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://coretry.ru/uplcv?utm_term=gta+san+andreas+android+data+files PDF link annotation
    • https://radekslodkiewicz.pl/files/file/72479158581.pdfIn PDF document text
    • http://www.como-grup.ro/fisiere/file/52208375879.pdfIn PDF document text
    • https://synersys.fr/contenu/file/19353070301.pdfIn PDF document text
    • http://fohow77.ru/upload/file/61496931015.pdfIn PDF document text
    • https://investincarpathians.eu/app/webroot/media/files/wumukogazipefejamujozije.pdfIn PDF document text
    • https://amgaa.org/temp/files/22444606874.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/galuzosuramogovufokajikim.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/dosakinenafewejimug.pdfIn PDF document text
    • http://robertwestlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/2393504863.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce4055f327---28395391688.pdfIn PDF document text
    • https://hojoairport.com/images/file/fuderinofuted.pdfIn PDF document text
    • http://dichvumucin.com/upload/ckupload/files/nunafujoseb.pdfIn PDF document text
    • https://officialbacknumber.com/editor_up/51861905304.pdfIn PDF document text
    • http://ausafe.net/images/art/files/49506180466.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/rosapomix.pdfIn PDF document text
    • https://12shio1.com/contents/files/45087461024.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/82672238382.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/lazerudopusinokenatod.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/banesuvugageziwejonetor.pdfIn PDF document text
    • http://greenhere.cn/upload/ckimg/files/202109162148475356.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/d20045d34b74a6fcf2b83bda0aa77770/24538364644.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/sjmjehnflsqhef1a0vlpac38fe/zenazubawa.pdfIn PDF document text
    • http://xn--80aadcnaeutgftohcogh8i8dsc.xn--p1ai/pict/file/90279345022.pdfIn PDF document text
    • https://interior-mark.com/ckfinder/userfiles/files/xexikiwupip.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://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_off00012acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACD 18588 bytes
SHA-256: f2aebc33e0bb462156620b5ca34804dd073d9dca502c39eca4c2ae82855ee472
font_01_sfnt_off00015af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AF2 10388 bytes
SHA-256: e2ecd388fb8b25cd9a0069ba9c1f6183e21626b86d4a7157246510b53e260f42
font_02_sfnt_off0001729a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1729A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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