PDF malware analysis — malicious · ccd4afc5d853d13a

MALICIOUS

PDF

82.0 KB Created: 2021-09-14 04:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 6b8a839a31810248c8ad1a48bf0f070d SHA-1: 230de5765687758434d93a0c7da46e401d9f8a65 SHA-256: ccd4afc5d853d13a726c150d5334a4d83985dcd6eb22ba77328ffb0df0f85d3d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of numerous unknown URLs indicates a broad distribution effort.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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 http://christmaslandint.com/userfiles/1272815309.pdf In PDF document text
- http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd98464a53---tefogofezawovefupajova.pdfIn PDF document text
- http://change4best.ru/upload/file/99803487332.pdfIn PDF document text
- https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/161363f65d0b8d---65251726307.pdfIn PDF document text
- https://vsevolozhsk.mebel18.com/uploads/files/debefuketojurodedixel.pdfIn PDF document text
- https://emenu.hu/editor_up/xefimunalukalilolejimi.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d13511f22b---33345830266.pdfIn PDF document text
- http://handsonmontessoripk.com/userfiles/files/rogupefiparufijujunudega.pdfIn PDF document text
- https://mma-montessori.com/admin/ckfinder/userfiles/files/gaxamodadegax.pdfIn PDF document text
- http://taiwanglassgroup.cn/userfiles/file/farominubas.pdfIn PDF document text
- http://clinicaveterinariabilancino.it/userfiles/files/kepulutiraxi.pdfIn PDF document text
- https://www.nhabe.com.vn/ckfinder/userfiles/files/kagagomagofuv.pdfIn PDF document text
- https://hattoco.vn/images/ckeditor/files/zupiwoxewuxetimupexeb.pdfIn PDF document text
- http://smarttechsolutionukltd.com/uploaded_files/userfiles/files/sebifogiza.pdfIn PDF document text
- http://npas.ru/pic/file/42371718043.pdfIn PDF document text
- https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/161307953c6ed0---24927523758.pdfIn PDF document text
- https://rainbowprinter.com/app/webroot/files/file/pojakofavubez.pdfIn PDF document text
- http://cioccolatogallucci.it/userfiles/file/16090793321.pdfIn PDF document text
- https://monographie.com/ckfinder/userfiles/files/70759028301.pdfIn PDF document text
- https://www.iieng.org/editor/ckfinder/userfiles/files/vigoxijesokiwelubijoguz.pdfIn PDF document text
- http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16137f234b094f---86714856984.pdfIn PDF document text
- https://signika.pl/Upload/file/51133432477.pdfIn PDF document text
- https://aneri12.eu/res/file/wazixulowesapugusugeni.pdfIn PDF document text
- http://kaztelcom.kz/ckfinder/userfiles/files/gugejedimivelalujogonew.pdfIn PDF document text
- http://karthikeyanjayaram.in/userfiles/file/geweninidiwozijemofoto.pdfIn PDF document text
- http://shuimotongyuan.com/userfiles/file/lokuveli.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=dua+during+sicknessPDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ddd4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDD4	10476 bytes
SHA-256: `2df8dbb59f66910db64d3467f92b5a09db86a8e59970ada0aaa11fc888eeeb9b`
`font_01_sfnt_off0000f585.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF585	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010d97.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D97	17404 bytes
SHA-256: `8f144d4522b57dbaa6d64bd48377e280c898324f01327cc3f162c94b9b369aab`

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