Malicious PDF — malware analysis report

Static analysis result for SHA-256 2296afea467ab67d…

MALICIOUS

PDF

133.4 KB Created: 2021-09-07 16:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 50cbe559867fd62c71bce2b67196d4bb SHA-1: aaf629ecf50dece99a25cae40c8832683c6eebbf SHA-256: 2296afea467ab67d5898eb6d16c37289430bb873bd0e17e9d1baf41e54fa52f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. Heuristics indicate this is a link farm designed to redirect users, likely as part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a9c9085ab---xoligixinugalinuxutuwaj.pdf In PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f07e74319de---95585517761.pdfIn PDF document text
    • http://surmounttravel.com/userfiles/files/duziwomonamenavux.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/40290821424.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/460d267ece679347bfc2929c42b8f17d/tinoz.pdfIn PDF document text
    • http://seedcambodia.org/htdocs/cljr/data/files/tanomobezomepuri.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/konisiretimag.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/vonejibiveru.pdfIn PDF document text
    • http://atel-j.nl/uploads/files/78065710942.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/38473547137.pdfIn PDF document text
    • https://fruzsiflame.hu/userfiles/file/xokefijanikinofemusag.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b21c8a714b---40258057758.pdfIn PDF document text
    • https://tyeetomsfishing.com/userfiles/file/58720559848.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/fkqq83cjqkv0aro2hnoc58gc52/57476693074.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/e8d52a8e51e151af1198f276cc2b4783/58991507358.pdfIn PDF document text
    • https://datawire.gr/files/files/xerurigakimubo.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/81578142002.pdfIn PDF document text
    • https://scalper.ir/data/files/file/zexixi.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/gatenumodesoju.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a6d6ec24b---tuxebakofivage.pdfIn PDF document text
    • https://proartgaleria.hu/files/files/fizafogikufitajiginuwu.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/62845341613.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=anatomia+oido+medio+pdfPDF 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_off0001a5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5B2 10324 bytes
SHA-256: 13137b8b50a138c8d7d341609865c814dfc2346cd862c5d3ec64da3b34d9066b
font_01_sfnt_off0001bcf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001d50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D50A 19988 bytes
SHA-256: 471731f6dcd1e57e9a5c8649eca9ce182363b5cdc11d0d2b9279ba083a7ed9cc

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