Malicious PDF — malware analysis report

Static analysis result for SHA-256 a34e24df6bf1ff68…

MALICIOUS

PDF

77.7 KB Created: 2021-06-10 20:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6949d261824bb958edfd12b0585512e6 SHA-1: af1d381c3a83b02547b8211b6a63e69bbf0b30e5 SHA-256: a34e24df6bf1ff68135f0d0077d55015aa28ae1bcd234d6de15b2846d4b1eeab
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous links to external resources, many of which are hosted on compromised WordPress sites or disposable domains. The high ML score and ClamAV detection indicate malicious intent. The presence of PDF_RANDOM_URL_LINK suggests an attempt to direct users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://inwebjor.ru/uplcv?utm_term=libro+curiosidades+del+mundo+pdf PDF link annotation
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/073daea62aa98c3de7de1cbfba49d447/74333123170.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8d1c72cd7---58214215581.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd09e6b2ef---67161565363.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/sogenepomep.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/dulijedofigejerolazo.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160abb0c665294---25735503491.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d944360f00---87405979732.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/tupixafafofowamexafufef.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc01589f0a0---99107897195.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/4cdefff5795ac4902c20551171656121/39855927395.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/86087360744.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/mihg0ql67gjpk7n9gcpvs1cg3o/wiloto.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/4d6028e35f5ff16d111b6122ff8e2c13/36849262108.pdfIn PDF document text
    • http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/najujodumokexotese.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/cb5e8e42d670da15247e90a8e766ea01/12778349703.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085905dba235---padidusomibubonajof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAC 5184 bytes
SHA-256: 08fef2167dd7dfa14cbd2a6d66ec39bb73854f0f328c1f6d673bed8bd935e168
font_01_sfnt_off0000de1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1E 11868 bytes
SHA-256: ee5d3c9b0ffb31571d143cb1d815cea399c59b7980c4b9fb8e59d987aa5a5005
font_02_sfnt_off000104f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F0 16140 bytes
SHA-256: 159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61
font_03_sfnt_off000119ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EC 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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