Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d7a69f4e7e6d872…

MALICIOUS

PDF

100.0 KB Created: 2021-07-24 23:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: dad411403e9a11f17c512a4a6db40d1b SHA-1: 60692490bedd10600bfd152b779509def8efb5cc SHA-256: 3d7a69f4e7e6d872026e7315a3450b8bc70d4ea7262b4c4db122c8c3b19f2208
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external resources, some hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely provides instructions and a password to access a separate malicious archive, a common tactic to evade initial scanning. While no scripts were directly extracted, the presence of embedded URLs and the overall structure point towards a malicious intent to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087530bebf18---1172506146.pdf In PDF document text
    • http://hattingtoemrerogsnedker.dk/userfiles/file/xezaverotas.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/a4adf72fe9313470e63ed4877b29e2d9/88647055207.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6034df361---38135355766.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/zoriwiwuwufilorigepoduj.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/pabgcoqfhnre09cthplhbk19pu/29209228903.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/31610320921.pdfIn PDF document text
    • http://italianopizzeria-pg.com/uploads/files/fexosalopofuw.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/suvexelapazenop.pdfIn PDF document text
    • https://olterus.info/contents//files/80002742535.pdfIn PDF document text
    • http://coffee33.ru/archive/file/linapo.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/536bdb5a126d21aaaabbb9b81ae39e32/72864724409.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/68ko5p2s8qmoampdai7f2r1ona/97778062958.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb31f256b5---pubefenam.pdfIn PDF document text
    • http://cokhiminhhien.com/media/ftp/file/75939722579.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743773aac91---39608194256.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/0bb36346a01840278fff524c5d1f8144/26658840669.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/9094239390fc7792cb49b1c7460d8ba0/lesipofuzu.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/tugelita.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/7829975788.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/f8c97973842efbf50e4ecb667af78cd8/wugovupi.pdfIn PDF document text
    • https://lemanssrl.it/file/32984794038.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b28c0b960d6---bixoximim.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a70b292b8---95230091934.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/21723873618.pdfIn PDF document text
    • https://e-fasteners.eu/media/file/57266799088.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=xforce+keygen+autocad+2014+64+bit+free+download+windows+8PDF link annotation
    • 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_off00011b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B91 11936 bytes
SHA-256: 9a6567eb369792298bc541ef6b89614c52b232a3181913f04a3bcfcea4ab824f
font_01_sfnt_off00013862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13862 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15074 17856 bytes
SHA-256: 6de21a4e824d7199ade5e0e2e2da282e995c68add373a0b5b42b13f15d4db849

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