Malicious PDF — malware analysis report

Static analysis result for SHA-256 a96871e0ac286748…

MALICIOUS

PDF

93.9 KB Created: 2021-06-29 08:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7770369e3ee5cde64ae1af1ab3ccfd56 SHA-1: 45c07560546fbf6ef5ed1be267137d2258ffc0d2 SHA-256: a96871e0ac286748a7b605cd58ab0f95a98f7c662eef95d6a4d74d508fe51acd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm designed to redirect users to malicious content. The presence of 'utm_term=pdf+replace+text+command+line' in one URL indicates a potential phishing or social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://ketchas.ru/uplcv?utm_term=pdf+replace+text+command+line PDF link annotation
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160706602d2d13---87384060271.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/rivonesanuliwixaguge.pdfIn PDF document text
    • http://alconburyreunion.com/clients/36523/File/42016306340.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/sijibadavasedatixaxa.pdfIn PDF document text
    • http://nhs71.com/clients/d/d9/d9c6bfbc4bbdd207836d30c01fe5869c/File/sesatukikasedax.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/16380992529.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/36013662305.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/1143512530.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/6f4265351e79db679c8fc2e8e8fcf4dc/32770447952.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/vm6l9o85agiskbh91aou1532vl/ruwolawinemop.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/28278169579.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///fopasapulidanopakor.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/sasexovevatufetikumazasel.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16086c308cf9ca---33056559873.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/0b4f528a32b30aced853e291be4d6a91/bujuvenojomijuzolenoser.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/a8df927a140e3334a6c81682a4b9a529/71203655835.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a081192a90a---dafaw.pdfIn PDF document text
    • https://chptravel.ir/data/file/rekezejowimonowenutib.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/aa5giqtbjpunel7ed6m6eqjrp0/90435178633.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/11327883980.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/qefvfkvvccsiefl6qpelvil6s9/14872473750.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c5bf16be3d7---84473135140.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86c96a676c---bobulexilawotefum.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/zudelelugebalitipo.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_off00010b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B23 17624 bytes
SHA-256: 9c721f25bb12288b1a01ec4ab8864e8ec8262bc616e4ecbf11caa865e13d814b
font_01_sfnt_off00013988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13988 10716 bytes
SHA-256: 12ee23acdae512e377a954a7dfece8229a0bf21fc1f2dbd7638ad62098b28e8b
font_02_sfnt_off0001521b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1521B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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