PDF malware analysis — malicious · d47032205123f24d

MALICIOUS

PDF

81.5 KB Created: 2021-09-05 20:34:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07

MD5: 8f117fb972e5e9213aab91e435f08552 SHA-1: 288171c188e878c07e2e2052fbe4f4b5ae52c1a6 SHA-256: d47032205123f24d543d1335cf33b5a89722cb0687653324db41912325ebc522

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised websites, indicating a phishing or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to exploit kits or further malicious content. The presence of multiple links on disposable hosting and compromised CMS uploads reinforces the malicious nature of this link farm.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://calmoinc.com/upload/editor/file/48406108177.pdf In PDF document text
- https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/c28db46ed973145f87eb8441964d589c/81778475940.pdfIn PDF document text
- http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/f89edf62201feea989b1bff57b7e4917/tazokutulopuse.pdfIn PDF document text
- http://travelport.pl/userfiles//file/5920212327.pdfIn PDF document text
- https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071fb1b10ea2---zimuzumakuwikejopi.pdfIn PDF document text
- http://asu78.ru/userfiles/file/80630341607.pdfIn PDF document text
- https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/848b124c2907e890d03963472795357c/87156635477.pdfIn PDF document text
- https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/8j892fns5o75lmesjj2c7rjamp/vewesubarifas.pdfIn PDF document text
- https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/99d31915f0f5925e7fa69fa9a73fe887/84558070177.pdfIn PDF document text
- https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084da0f5a7ef---wijukifutog.pdfIn PDF document text
- https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc2379a516---10262438981.pdfIn PDF document text
- http://theheavent.com/userfiles/files/79098219177.pdfIn PDF document text
- http://debnine.net/UserFiles/File/52505709626.pdfIn PDF document text
- https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c91e48518---ninez.pdfIn PDF document text
- http://bjhtdszdh.com/v15/Upload/file/2021728110361995.pdfIn PDF document text
- https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/iqot2e7hgbuis1oqqjvp9i9i2s/88359336430.pdfIn PDF document text
- https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/10e8e6c7f51449dcdda9fb192660eadb/20872732724.pdfIn PDF document text
- http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a43c82ef0a5---39816752431.pdfIn PDF document text
- http://seamcc.com/UserFiles/files/zinevakosubosadonitare.pdfIn PDF document text
- http://studiorestagno.eu/userfiles/files/12595496034.pdfIn PDF document text
- http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af76b294cb---1755367835.pdfIn PDF document text
- http://pokewaveanaheim.com/uploads/files/kaxobujuwinurunose.pdfIn PDF document text
- https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/6d5c71736355e764fc3012969d64fb48/7088495124.pdfIn PDF document text
- https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/d96985a99ec0e162fa1e4d83f6cd8c70/fanuwetemaxo.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=dispositivos+electronicos+floyd+9+edicion+pdfPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d49d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD49D	19260 bytes
SHA-256: `cd57bd1892cf95da001699dc6a293c90afa2639dd2e424d3cfcddbe1eec382a0`
`font_01_sfnt_off00010678.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10678	10800 bytes
SHA-256: `68901d855959f4c8e872ee161beb2af19c1af876de17b8c76fdb54212686e5ed`
`font_02_sfnt_off00011f89.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F89	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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