PDF malware analysis — malicious · ce172637c0a1e532

MALICIOUS

PDF

84.5 KB Created: 2021-09-04 04:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01

MD5: f8877c25d52132b05ed913e87e93a526 SHA-1: de6746737ef57a114f253e4becd4c4e9995d7d8e SHA-256: ce172637c0a1e53228b90af764553aba99199c8f90caa730b7dd3cb042770670

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier suspicious score 0.4045

Heuristics 5

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
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.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096fd519be84---47539493030.pdf In PDF document text
- http://firegallery.ru/img/upload/4345935131.pdfIn PDF document text
- http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/4554d4da2656392c8d14f6cbf7d75199/69751555616.pdfIn PDF document text
- https://cmfnepal.org/userfiles/files/64641841160.pdfIn PDF document text
- http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/964ae4c911bc34a2f4f692bfe6a3345a/3443427626.pdfIn PDF document text
- http://wu-pao.com/upfiles/editor/files/sijeguwifotulawutax.pdfIn PDF document text
- http://geometramaurotozzi.it/userfiles/files/25629051400.pdfIn PDF document text
- http://kozszemle.hu/uploads/files/jagawax.pdfIn PDF document text
- https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/cinl4bc522p6jg6sjdsasd0cc4/36186564027.pdfIn PDF document text
- http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe94e36dfb9---81639323453.pdfIn PDF document text
- https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071130fb5d72---fisorojulamejozivem.pdfIn PDF document text
- https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/466b7d7548797d02b63619ef5a69a43f/43794756887.pdfIn PDF document text
- https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/c893d27e84f38cd5434b334fa4f61257/vugoma.pdfIn PDF document text
- http://forter.vn/hinhanh/file/74440851484.pdfIn PDF document text
- http://shuimotongyuan.com/userfiles/file/vezevagevawa.pdfIn PDF document text
- https://jeanmarcrobion.fr/userfiles/file/xelesivezepomeregobagufam.pdfIn PDF document text
- https://akapacha.com/userfiles/file/37996496624.pdfIn PDF document text
- https://too.kg/wp-content/plugins/super-forms/uploads/php/files/60e02fd7f13060dfe408a10aa45bfe5a/31170351897.pdfIn PDF document text
- https://pianotuningdarwin.com/userfiles/files/migeligusezizaduxaja.pdfIn PDF document text
- http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774cd9b1a40---velazizekasaluri.pdfIn PDF document text
- http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160825c668afe0---juxideguxisi.pdfIn PDF document text
- https://schmitz.cz/res/file/25154591758.pdfIn PDF document text
- https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/e89210a2b821a68038fc012de25ab124/fexodoxibilumosax.pdfIn PDF document text
- https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/3607732cd546c06a39617045e4a28004/xewedugowitazulolidepof.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=basics+of+nanotechnology+pdf+downloadPDF link annotation
- 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_off0000f36e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF36E	18568 bytes
SHA-256: `3ee55e8facfa5e46f160184b90578600c2306db39cb441f6eac6125a6e24af0a`
`font_01_sfnt_off00012419.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12419	11052 bytes
SHA-256: `74e021e5819c8528bf0fef3c0ff848b1ed7021bb8821cf0e485177f7db23c7c3`
`font_02_sfnt_off00013daf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13DAF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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