Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a95fe60d2b07b6f…

MALICIOUS

PDF

69.2 KB Created: 2021-09-11 11:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: f0a2351331bbdc001fee3aa8a433da11 SHA-1: 6ad3b6a9b8e39d0628e12d55351f1636b852556c SHA-256: 2a95fe60d2b07b6f7185d9c92128971402a5604ffec7457d4b2fa0ebce0fcd03
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of a click-outward action and a small file size further supports the lure hypothesis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://novitas.ro/files/tibamojudala.pdf In PDF document text
    • https://art4you.sk/editor_uploads/system/files/mulamanubuv.pdfIn PDF document text
    • http://wernitznigg.at/files/38639232982.pdfIn PDF document text
    • http://enovosti.info/ckfinder/userfiles/files/38882962009.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161395100870ab---56546259353.pdfIn PDF document text
    • https://aromamarketing.md/img/files/rekisof.pdfIn PDF document text
    • https://htapigroup3.com/contents/files/17418229638.pdfIn PDF document text
    • http://mqskin.com/luutru/files/51832091857.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161375a411cfbd---woteratalixifefo.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/zowazukeg.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/zejunasoxipiku.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132a7cebd2fd---9581103522.pdfIn PDF document text
    • http://secohthailand.com/file_media/file_image/file/81703022964.pdfIn PDF document text
    • http://etkindenetim.com/resimler/files/dajejotubufo.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/60979929092.pdfIn PDF document text
    • http://liily.jp/upload/file/20210904053753.pdfIn PDF document text
    • http://abbeytraining.net/userfiles/file/ravepukewimiwedoxinur.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/3060245522.pdfIn PDF document text
    • https://susta.vn/userfiles/file/gasupotupaxezet.pdfIn PDF document text
    • https://www.babetravelling.com/ckfinder/userfiles2/files/87109719510.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c05857c6a0---ragewazomiganata.pdfIn PDF document text
    • http://thietbiantoanttk.com/uploads/files/74786731558.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/nomeriribodovejigopidadi.pdfIn PDF document text
    • http://tageedesign.com/ssmpt/documents/file/zerevik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=betwinner+apk+free+downloadPDF 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_off0000b1f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1F6 10556 bytes
SHA-256: 517b148c91e16f0e51929a489bdc3680ecb8d93d518f484f32d95876fc33dba0
font_01_sfnt_off0000ca33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA33 14316 bytes
SHA-256: a7db337c6c914709cc364825f61af12815831e6302407c7cc2e4963815aca735
font_02_sfnt_off0000ed9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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