PDF malware analysis — malicious · cd74b54fdcacf82c

MALICIOUS

PDF

94.8 KB Created: 2021-09-07 14:33:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 6b06fe2ff9829d7c99dbde53ac57d29d SHA-1: bc984b1b45260c333938428eac60465b8c241244 SHA-256: cd74b54fdcacf82cfc2fd0c7f7a9020a634be42139cde76e9d50d1489e56f43a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. The embedded URLs, such as 'https://drafthe.ru/uplcv?utm_term=dell+e4300+user+manual+pdf', are likely used to redirect users to malicious content or phishing pages. No scripts were extracted, but the PDF structure and URL patterns indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9889

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://drafthe.ru/uplcv?utm_term=dell+e4300+user+manual+pdf PDF link annotation
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fdb6d1c285c---9277137632.pdfIn PDF document text
- https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/otjvmmh6pikrccjp5q6368bs25/66444652623.pdfIn PDF document text
- https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1385400a7---tipijawezetepalo.pdfIn PDF document text
- http://hsound.ro/images/custom/file/forujufapopob.pdfIn PDF document text
- https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/gda8vdkuvp3a4be8abbb81mro6/duzodajezewepototol.pdfIn PDF document text
- https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/79da5173874b65f1ca1da21308e88bc8/53917750716.pdfIn PDF document text
- http://mebizstekla.ru/userfiles/file/falutamejuzokomo.pdfIn PDF document text
- http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef5cf2a0f9---65789653570.pdfIn PDF document text
- http://sxcec.org/userfiles/file/16087310082.pdfIn PDF document text
- https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/edc0913d0adb7e35555df25df98c0e57/82622238194.pdfIn PDF document text
- http://ipsgroupjjn.org/userfiles/file/vagajejovapadotagulufog.pdfIn PDF document text
- https://autotoner123.com/home/autotone/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/98916679841.pdfIn PDF document text
- https://go2germany.ru/files/file/vesoleba.pdfIn PDF document text
- http://generaltubi.com/container/ckfiles/files/89896643793.pdfIn PDF document text
- https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609445d0d3e88---wofadimijexapu.pdfIn PDF document text
- http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/c81acbfd26184016eae323938fb61375/88078424241.pdfIn PDF document text
- http://hotelpenza58.ru/ckfinder/userfiles/files/74555606599.pdfIn PDF document text
- http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16114b30f3ae97---73462975506.pdfIn PDF document text
- http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b459b4f896---nemite.pdfIn PDF document text
- https://brahmagnanam.org/fck_uploads/file/18725355095.pdfIn PDF document text
- http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c801b61c0---gixezo.pdfIn PDF document text
- https://infoenergie-loire.org/userfiles/file/bejilelajo.pdfIn PDF document text
- https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4cdcc6dda5---novevux.pdfIn PDF document text
- https://www.jaegeraviation.com/ckfinder/userfiles/files/rojobulosogofunotaf.pdfIn PDF document text
- http://aodaibooking.com/FileData/ckfinder/files/20210629_B873D8B9287BE760.pdfIn PDF document text
- http://wych123.com/upload/files/furawibazosenadoza.pdfIn PDF document text
- http://kstarsmall.net/userfiles/file///50911655831.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_off0001091e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1091E	19632 bytes
SHA-256: `5d92d82bdfd4750dfc87ad544aa41faffcec3354d1361f3fed473a90a346d454`
`font_01_sfnt_off00013c3b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13C3B	10820 bytes
SHA-256: `0f36b75d714b9b53e73e494c431574f69c593a74874ab290c2a9afae63919346`
`font_02_sfnt_off00015541.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15541	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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