PDF malware analysis — malicious · cacec8d5e95c08a6

MALICIOUS

PDF

83.4 KB Created: 2021-06-26 16:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: b6ee36b7c3e9bb70a7b10e9c6b8ab3ae SHA-1: 23556dcef8a81d295b525407e8e8dd5c83f30523 SHA-256: cacec8d5e95c08a60d0e569e8d0b28385d28f153be97f632b0362775014cadc1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely intended to lure users into clicking malicious links. The presence of external URIs and link farm characteristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9946

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://wastran.ru/uplcv?utm_term=moana+movie+questions+and+answers PDF link annotation
- http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089521ce13a6---zufogido.pdfIn PDF document text
- https://unique.global/wp-content/plugins/super-forms/uploads/php/files/0c4b992f57c91f689f4ddbfea4288c0a/mufusezab.pdfIn PDF document text
- https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/2bf61eaff069044f5dc594ca7c562925/69298935251.pdfIn PDF document text
- http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ce2717dae---xonipivufirepuni.pdfIn PDF document text
- http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac273f3e2c---25624073917.pdfIn PDF document text
- http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b417aaa6b2c---zuranumapotike.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5f2e00a0e---sunumusabebora.pdfIn PDF document text
- http://ahxxzx.com/userfiles/202105/file/labilonogesuburodufenosef.pdfIn PDF document text
- http://svazekobciorlice.cz/userfiles/file/88375029122.pdfIn PDF document text
- https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/226536153dfbbadd23748c5788c963fb/49820709257.pdfIn PDF document text
- http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/karurefojabotolisuzuso.pdfIn PDF document text
- https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/grofvrsdb574o42mcgl67lvor2/70935643430.pdfIn PDF document text
- https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b7429ec57---jikipabitex.pdfIn PDF document text
- https://airtelco.com/data/users/_/email/files/44207165288.pdfIn PDF document text
- http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bd02ab86c---48262042619.pdfIn PDF document text
- https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df82b79654---69518018210.pdfIn PDF document text
- https://saam.vn/images/content/file/42015013055.pdfIn PDF document text
- http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607396325ef32---11790492106.pdfIn PDF document text
- http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940f4f8f1ea---judijikezanuvasifevikot.pdfIn PDF document text
- http://rlangkhan.com/upload/userfiles/files/87917257523.pdfIn PDF document text
- https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/950910888f857c4e2052fdade13d0a6f/30487443569.pdfIn PDF document text
- http://jfkanacon.org/data/userfiles/files/mozane.pdfIn PDF document text
- https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16075ab7b96573---93075298867.pdfIn PDF document text
- http://aarogyamedico.com/userfiles/file/21873056839.pdfIn PDF document text
- https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608db91decca5---48077186665.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_off0000e28c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE28C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000faa3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAA3	10752 bytes
SHA-256: `a4c968b02319fabd40d753eaa922653324a0a92f76892ba8659bfc43b5d1010a`
`font_02_sfnt_off00011334.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11334	16704 bytes
SHA-256: `87ec049ac904d4334a450ba59c666b0f19bbae2820d839b29fe2c1c6e6b88c32`

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