Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b3048d78043d07…

MALICIOUS

PDF

84.1 KB Created: 2021-08-30 04:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0ece47ed97e55b88b18eed33ba95637b SHA-1: 981b1a031f82d62adbabcfae86c1dd9b4caae5d3 SHA-256: 68b3048d78043d0763919104c2837e271eb2aa6e707f61b72090c70d277230be
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting it's designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://garglob.ru/uplcv?utm_term=the+book+of+snakes+pdf PDF link annotation
    • http://linpus.com/app/webroot/userfiles/files/91110624960.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/b124fd32b6a8cdf3781ea330d0b3a929/74723495402.pdfIn PDF document text
    • http://ibiforstarlight.ca/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/jofabegulilasosijevax.pdfIn PDF document text
    • https://habibitoursegypt.com/ckfinder/userfiles/files/dujujodiwodo.pdfIn PDF document text
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/legos.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/838f4f69ea6074169b9d6b95790000d6/logugekoruladarilumed.pdfIn PDF document text
    • http://meskerjager.nl/media/files/55950691526.pdfIn PDF document text
    • https://sudhirsachdevaclasses.com/ci/userfiles/files/94050748552.pdfIn PDF document text
    • http://efuturesthai.com/uploads/file/nemujofowutorib.pdfIn PDF document text
    • https://immobilgold.com/file/vasixekedudopomo.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/161129fc728f63---41672716630.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/a8823552e12f3a5e50556777143fd2d2/kigudomi.pdfIn PDF document text
    • http://eva.am/files/b5a4580855536cd7.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb01c6b6f6---89040093446.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/54329283675.pdfIn PDF document text
    • https://arerp.kr/data/file///zesozuwuxe.pdfIn PDF document text
    • http://an-professional.ru/img/files/file/80539983667.pdfIn PDF document text
    • http://samurairamenbar.com/uploads/files/putuxenixuzikitanaxo.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/banogopevo.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_off0000e4c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C6 10456 bytes
SHA-256: 316a930f0752df66d63a555d2cac1d0235a20149334a1168e0b599630f197a1d
font_01_sfnt_off0000fc3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3C 18236 bytes
SHA-256: 728fae0a10fa3372d69e2f1e5ed3cee9badad38a7dd03c34d9e3413bd1e81a0c
font_02_sfnt_off00012b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1