Malicious PDF — malware analysis report

Static analysis result for SHA-256 3caba2e2ec040ad8…

MALICIOUS

PDF

76.2 KB Created: 2021-07-16 00:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ab25791cd610a2aa63e918cee5432037 SHA-1: 9feeee006e85476dc7e7cd523b359d44ed425b6d SHA-256: 3caba2e2ec040ad87367e5eed2117ec140a82712910dbde6678e3913bb406fb1
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. It functions as a link farm, containing numerous URLs that point to various websites, many of which appear to be compromised WordPress installations. The primary purpose seems to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://philabc.ru/uplcv?utm_term=who+is+dababy+dating+2020 PDF link annotation
    • http://allprintusa.com/admin/images/file/24199937112.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b283a9ca5---wigumiw.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/dee036cee6a152632f5c0b853adf2132/43147935904.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/7thqg05g5c32ubdg8f9t7cqv3p/wusedewaxerusoba.pdfIn PDF document text
    • http://patrick-jardinage.fr/ckfinder/userfiles/files/67019220202.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b90545d4c7b---datiwaxezumubapizetosus.pdfIn PDF document text
    • http://studioindelicato.com/userfiles/files/tudipujejexibojolukila.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b1d7e60b5---jofisuxasizilelasopam.pdfIn PDF document text
    • http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/38838128315.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/52424931346.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/33285905940.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/gasakunisuv.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f60fb815f---79523477574.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b337fd85715---4565230544.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/61tck52fdt0451kndmnjdma1n7/26638101191.pdfIn PDF document text
    • http://smn68.com/clients/75339/File/morukarevevumepogek.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/dda3c78bbf6b9dc78f1547acafa55b45/sewasekapisajejawig.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/gowegebepofexeno.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/4388832905.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160875f90df75b---40538234219.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082644ba2854---xuboxiguz.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/rimosasokijilijodesotovo.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/dexid.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_off0000c794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC794 10740 bytes
SHA-256: 6e2003218b86fea77e86f2388decf851d57102e742455039115a768b0b232ef2
font_01_sfnt_off0000e015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE015 16228 bytes
SHA-256: b696601f3181b431cbee860ab60edef01f97cfb7a4b8d9d68d4f188185a971c6
font_02_sfnt_off000109d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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