Malicious PDF — malware analysis report

Static analysis result for SHA-256 4076e4de668fafe0…

MALICIOUS

PDF

100.3 KB Created: 2021-09-07 05:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a976cacc987e71d811eae5ebda8d7008 SHA-1: 2ce771ce5f66f8c03f25af5240aeaaaeb338d37b SHA-256: 4076e4de668fafe0052a8ce3f54020d35e01befe3a0e44c5514af82006c54895
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms strongly suggests an attempt to lead the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://chcial.ru/uplcv?utm_term=manual+software+tester+jobs+in+canada PDF link annotation
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/03rdboav06sfvv335pm879q9vg/68356984522.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/26986030768.pdfIn PDF document text
    • http://kustari.net/userfiles/file/59540107341.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765927a7ff6---56694983890.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160adacd2d60a4---69927186023.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/wowudojebaludezavodex.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d778463ca3---zerisigifexuv.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/neviwubanagoloposuxogejox.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16070ede588dfd---gidisab.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16090a9b6e2251---89104379982.pdfIn PDF document text
    • http://exosushi.com/uploads/files/kumexamu.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094237d9159c---vilevevugeraton.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/6uldtlcvddd1p7jpnv6vvu0l31/30364195077.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ee7225734---55381961554.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a8f559c78---mokitevenuxutob.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/47431612396.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/00d5dc1fc5fbaf059c30912e16b1be08/zobutib.pdfIn PDF document text
    • http://nhatngungoisaoxanh.com/upload/files/10697850618.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e2a701417---2337430301.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/f190b8b8edd5d300f240cd1bb0cda5bd/71506526474.pdfIn PDF document text
    • https://solener.info/ckfinder/userfiles/files/popazalitopapa.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/balorajujatopinotekar.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_off00012010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12010 10916 bytes
SHA-256: a3978339097fa08c69863fb8f04ba849670b68281f71d3c5ba3de53f6b25fd50
font_01_sfnt_off00013982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13982 18964 bytes
SHA-256: 94aa4ac870dfe467298902e8b2a8b6efdae8caa28807fc176c614525e5254606
font_02_sfnt_off00016b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.