Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97e18f3d57854e0…

MALICIOUS

PDF

69.1 KB Created: 2021-09-24 11:10:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1e1f5f66695818b865c9edc7dd7779e8 SHA-1: 5268429e698be86d6dbe7b0cd86490cd45bb9da9 SHA-256: d97e18f3d57854e0e32753ae6c988f0efc94c96f47dbafcdaca0928264d76bf3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of external URIs and link farms points towards an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://allytemp.ru/uplcv?utm_term=android+messages+not+downloading+mms PDF link annotation
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614bac5a7e550---pipodar.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/lusirebugobiti.pdfIn PDF document text
    • http://fluorescent-training.com/file/meropupaxekim.pdfIn PDF document text
    • http://scea.edu.mn/ckfinder/userfiles/files/mezipiguranepe.pdfIn PDF document text
    • http://timnhanhonline.vn/upload/files/mexile.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf8e60ef12---19967846592.pdfIn PDF document text
    • http://autoneza.cz/UserFiles/File/jirexomibofijukiruzaz.pdfIn PDF document text
    • http://ciskmv.com/css/file/rawapovuxexogovuj.pdfIn PDF document text
    • http://gojjang.com/uploads/files/89995208782.pdfIn PDF document text
    • http://esangsok.com/upfile/files/lawojet.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/jinokixamutanipokudu.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec2a6c2b20---zuxinigugadanositagomika.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/23534955947.pdfIn PDF document text
    • https://ijpdua.com/contents/files/46406279213.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/97305386329.pdfIn PDF document text
    • https://tranhdaquyhn.com/uploads/news_file/rojavitesexekufivozene.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613e35c7336a6---82581258199.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf3d8394f0---80655035878.pdfIn PDF document text
    • http://matras-devison.com/upload/file/monipemirezeselotinazus.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/55233720816.pdfIn PDF document text
    • http://konberdbio.com/upload/files/vukeliwixatopexesajep.pdfIn PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/17038539258.pdfIn PDF document text
    • http://vindindex.nl/images/uploads/namimezusinemeromunuduwet.pdfIn PDF document text
    • http://studioindelicato.com/userfiles/files/56649055539.pdfIn PDF document text
    • https://ms1oke.com/contents/files/daxoxogubuseda.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/sutadukuropefepuduk.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_off0000b287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB287 10660 bytes
SHA-256: 358e828db531fe0d8ba66acb5e22e05bfe36b976915ffa4fa41b862523fd3ae7
font_01_sfnt_off0000cacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCACB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DD 14312 bytes
SHA-256: a4ec5e59e9c8e505082e943487c3744335fecbd440b19abdb1beeabaab0c56ff

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