Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c0d32051fb85b6…

MALICIOUS

PDF

91.4 KB Created: 2021-09-11 20:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dabaab038f3aef554f5c192c5432f089 SHA-1: b3d9889a09a8bc8130535fc59d83d3d872ba6b93 SHA-256: 60c0d32051fb85b6e6b4cd8e06cd94a578150ad0342b9b143bcfddb98417429f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links pointing to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous external URIs and link farms suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pistant.ru/uplcv?utm_term=xiaomi+redmi+note+3+custom+rom PDF link annotation
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0d9d5feb1---xegozuzob.pdfIn PDF document text
    • http://storemisr.com/uploads/files/tenetuwijesa.pdfIn PDF document text
    • http://kabaretyimpresariat.pl/Upload/file/96748780134.pdfIn PDF document text
    • http://ricettebiagi.it/uploads/assets/file/gilivogotix.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/t0o54dvotjrusitt79ue976gd0/getodoz.pdfIn PDF document text
    • http://mtt-association.fr/upload/file/53149574384.pdfIn PDF document text
    • http://houstontca.org/Content/uploads/files/79657542766.pdfIn PDF document text
    • https://terracell.info/images/file/909857561.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/1ac0585e57d2fd02cfa8dfa209c747a7/wapexakuzotazusave.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/75324f8d13e110d1181ccab91bfb6028/14703046528.pdfIn PDF document text
    • https://ojazzdance.fr/userfiles/file/48146838777.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/20ad967c1330ed82c85d89b55b14619a/89566110349.pdfIn PDF document text
    • http://1night2daytour.com/ckupload/files/mebizujowafuvenevu.pdfIn PDF document text
    • https://ferropula.hr/files/vagitexemugukejujewif.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613862d4e19d4---99078839130.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/xenirisowugatul.pdfIn PDF document text
    • https://indiachristian.org/uploads/files/taberux.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/dobovox.pdfIn PDF document text
    • http://cuacongtudongbinhduong.com/upload/files/gufatekamig.pdfIn PDF document text
    • http://klhl.com/userfiles/file/60791190953.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16134294c75c39---veneravuwobadegu.pdfIn PDF document text
    • http://edilgroupdigiovanni.it/userfiles/files/31643931686.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_off0000fb57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB57 10764 bytes
SHA-256: ba938b9b2e940917daf05865c2ae9d1a3ff356fef04de9e316132cdbcb49f1f3
font_01_sfnt_off00011421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11421 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C33 19796 bytes
SHA-256: d031133038370f8a3b93480701b469cbe8cc1cf984394b3fa8331912a4046d4b