PDF malware analysis — malicious · daae2c995203dd6b

MALICIOUS

PDF

85.4 KB Created: 2021-09-01 04:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 7277f6545c107ac1f4c235adeb4a0ba5 SHA-1: f28ad62285e88941782774dde5a113408bdea02c SHA-256: daae2c995203dd6ba8f11cc113edaaec09847fe4441cd3060977900832b0f6c6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs hosted on compromised or disposable domains, likely for phishing or malware distribution. The presence of PDF-specific heuristics suggests exploitation of PDF vulnerabilities or malicious content embedded within the document structure.

Machine Learning

Nyx PDF Classifier malicious score 0.9957

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 https://archism.ru/uplcv?utm_term=git+checkout+new+branch+from+remote PDF link annotation
- http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e61dbbbab4---41077367237.pdfIn PDF document text
- https://hanahana.vn/media/ftp/file/97043388930.pdfIn PDF document text
- http://zhengfutz.com/v15/Upload/file/202151750131704.pdfIn PDF document text
- https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160daa020531fd---75345650526.pdfIn PDF document text
- http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608d118b03b5e---livogemoxi.pdfIn PDF document text
- http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/31fe86e4176c09276783a872d01723f4/99145760632.pdfIn PDF document text
- http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c5cd554300a---jepesusaborotisizije.pdfIn PDF document text
- http://eastmoorclassof1970.com/clients/4/43/4343e427eb1b0a0668350338a4d6b623/File/50829557776.pdfIn PDF document text
- https://gangnampools.com/contents//files/83809938759.pdfIn PDF document text
- http://awkontrakt.pl/ckfinder/userfiles/files/fijimuvuduvumigidixupikoz.pdfIn PDF document text
- https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c61ade99789---44430827716.pdfIn PDF document text
- https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/77a07f5964a6add9f7f27cef7bff105f/buruzedugolemumi.pdfIn PDF document text
- https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5a0ade1fd---22078805567.pdfIn PDF document text
- http://www.advokat.com/app/webroot/img/fck/file/bumizijebubale.pdfIn PDF document text
- https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/b16f91743e8a1e990fa710c52c5ac164/1136737998.pdfIn PDF document text
- https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/bd6925ce73dddf9165b00f113b1c9acb/wonogeg.pdfIn PDF document text
- http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a99aa6988ae---98787060379.pdfIn PDF document text
- http://kiapelhrimov.cz/UserFiles/File/36197977724.pdfIn PDF document text
- http://lammermoor.net/imagenes/file/tasufudad.pdfIn PDF document text
- https://confidence-ist.com/ckfinder/userfiles/files/60826003421.pdfIn PDF document text
- http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/qskqi0e9mhpvah2m14nis4as3q/kolemen.pdfIn PDF document text
- https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0a2bd9069---43446733030.pdfIn PDF document text
- http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160759ff1da434---sesuzo.pdfIn PDF document text
- http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113052fc4283---kafubisinuruworopip.pdfIn PDF document text
- http://eugensa.lt/app/webroot/uploads/userfiles/files/29243363587.pdfIn PDF document text
- https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/04e516f451c66500e36eaf13de72c45c/pukujojokuratojanegumepa.pdfIn PDF document text
- 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_off0000e8c7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8C7	17696 bytes
SHA-256: `990508f569cce68259e57f3400d427f0becec017473931638648f707f4d1d0d1`
`font_01_sfnt_off00011652.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11652	10844 bytes
SHA-256: `53cf46373e39dba1558f7535fcde0687fa0b157dab3ed200ca1288c0581526b0`
`font_02_sfnt_off00012f4b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12F4B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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