PDF malware analysis — malicious · 6c2a99fac6e37c60

MALICIOUS

PDF

91.2 KB Created: 2021-07-06 09:06:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 6c7ade8b1820f4a2f2f2b25763ca2e46 SHA-1: a6409399ae96404a3331b502f4a53c4081fb6774 SHA-256: 6c2a99fac6e37c605aaa8426224e4a4525602cecb3ac45e5d7f001a787b0ab6c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it functions as a link farm, directing users to multiple compromised websites and disposable hosting domains. The embedded URLs suggest an attempt to distribute further malicious content or phish for information.

Machine Learning

Nyx PDF Classifier malicious score 0.9765

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 https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4484d16022---88250789031.pdf In PDF document text
- http://investin-khj.ir/ckfinder/userfiles/files/gixibagapomigokaxi.pdfIn PDF document text
- https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/uc16gf21qt9jmec4f8f56bko9t/2054546706.pdfIn PDF document text
- https://vivaldiroberto.com/img/files/mediafiles/file/75651532556.pdfIn PDF document text
- http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7435882db---74766900749.pdfIn PDF document text
- https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c756819c87---gunuvubikofaxalovela.pdfIn PDF document text
- http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608605ddd9f4f---66185960320.pdfIn PDF document text
- https://bahamianbrewery.com/ckfinder/userfiles/files/99401214914.pdfIn PDF document text
- https://commonwealthsportsawards.com/userfiles/file/17158198150.pdfIn PDF document text
- https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/64943ce1451263bc9fbbd8097a7296ce/19161521353.pdfIn PDF document text
- https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/ranajisonituxubefipefi.pdfIn PDF document text
- https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607893c241abb---towiwatidugutikoxi.pdfIn PDF document text
- http://happinessgown.com/upload/users/files/2300427381.pdfIn PDF document text
- http://alibabashipping.com/userfiles/file/75913943961.pdfIn PDF document text
- http://oreade-breche.fr/userfiles/file/furesunidufupaju.pdfIn PDF document text
- http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a9bbed1ae---suvopepotegogudesuvez.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3ec223680---58446655733.pdfIn PDF document text
- http://meyergarden.com/ckfinder/userfiles/files/nofiz.pdfIn PDF document text
- https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/65fd4d9411092c5e7747c64814fcf649/fetepurozoxunixajuwoxoki.pdfIn PDF document text
- https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/38g6ofu9sa2v3e5dqifclhogdh/datederawanijuneru.pdfIn PDF document text
- http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16085079e284d0---53422548191.pdfIn PDF document text
- https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/e5edbe2c2b5ae8f0bb1ea5c8c9107676/vifegidabuwa.pdfIn PDF document text
- https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/pvdmmhqgstgckhldjs9ak0jjct/77042098443.pdfIn PDF document text
- http://waukeganeast1980.com/clients/877304/File/89956599565.pdfIn PDF document text
- http://dlzj.net/upload/files/20210703135536252847.pdfIn PDF document text
- https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d48b772fc1---16235865213.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=concurrent+list+borrowed+fromPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ead1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEAD1	16100 bytes
SHA-256: `505f1f16fb057e2a34e7666bb0a43a50f2e0b7bc0033e59b70183295ac12d2e9`
`font_01_sfnt_off0001000e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1000E	10832 bytes
SHA-256: `13ce6cd7724bac448b042b427ec6c5d85f6b8c06e96b43967cc10e0862b377b9`
`font_02_sfnt_off0001191a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1191A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off0001312c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1312C	16972 bytes
SHA-256: `03bd2db9a45fcecc82116c41b1bed3e1d6bea80b81b1b7ab6837fd95be8d0fde`

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