Malicious PDF — malware analysis report

Static analysis result for SHA-256 c64c46650f782993…

MALICIOUS

PDF

73.3 KB Created: 2021-09-15 23:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1b6f2032ec3fa2171bf947079ae749d0 SHA-1: d87567954497427be8647e9e74dae1123c338157 SHA-256: c64c46650f782993e0e431f888dcf45f81ca22cc8ed3efb940c2c5af0b97cacb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads. The presence of numerous disposable and potentially compromised domains suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://infrive.ru/uplcv?utm_term=simpsons+tapped+out+generator PDF link annotation
    • http://elcampoeco.org/FCKeditor/file/tarelu.pdfIn PDF document text
    • https://parc-hotel.info/file/2672832235.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/limazirugogusexelaw.pdfIn PDF document text
    • http://mcdanielz.eu/files/file/filukas.pdfIn PDF document text
    • http://potlista.com/file/files/21178207403.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///2021091442833_1008089750.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16140580412afc---93541042970.pdfIn PDF document text
    • http://www.malagatour.es/ckfinder/userfiles/files/47518140074.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5ef34ff0f---56537063958.pdfIn PDF document text
    • https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/96548280968.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/35173381285.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161422820135c3---junukutoturiforor.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/makunuwusipagafuxawax.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/31487726135.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/4htcecejovju9266r48g492pn7/bidiluwawimiwumos.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/21041981607.pdfIn PDF document text
    • http://fotosvatba.net/userfiles/file/varalat.pdfIn PDF document text
    • http://www.portaldasfreguesias.com/portugal/vianadocastelo/vianadocastelo/geraz_do_lima_sta_maria/ckeditor/ckfinder/file/pamogowutu.pdfIn PDF document text
    • https://bongkartuantakur.com/contents/files/pixubugagulaxixisupuvabi.pdfIn PDF document text
    • http://www.sec-ollivier-associes.fr/www/upload/file/finamutuviwimodub.pdfIn PDF document text
    • http://yunnanyingxiang.com/ckfinder/userfiles/files/34484047651.pdfIn PDF document text
    • http://missteenqueenuk.com/userfiles/file/56209748536.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/5larr7lr12tqcm7ra10djnhtac/zozilumo.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/38904576037.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613381858f4e6---14637985091.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_off0000bcf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCF1 10864 bytes
SHA-256: db4c4f030c0d0425f726b5a4a93507a14de2ffd9dc0adabce88504d1ead24dc2
font_01_sfnt_off0000d5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000edd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD7 16464 bytes
SHA-256: 954a9b76a85e417f52aa0d5a20b76e9ba33e86740fdfc193e30c9318a7544327

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