PDF malware analysis — malicious · d3ababed5b5570b0

MALICIOUS

PDF

79.4 KB Created: 2021-08-20 20:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 6a83aafce06b1dad6927437f883764a8 SHA-1: f803ac6e4d4136cdc94981bb797eb0b1101ec4ec SHA-256: d3ababed5b5570b00298fd704e8147a6df44a5c275f9bce4fb3a47a84a73a288

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It functions as a link farm, containing numerous URLs pointing to other PDF files hosted on potentially compromised or disposable domains. The primary purpose appears to be directing users to malicious content, likely for phishing or to download further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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://kungfuclasshongkong.com/louis/taichi/ckfinder/userfiles/files/13697155841.pdf In PDF document text
- http://ahxxzx.com/userfiles/202105/file/bakumowosekezebidijer.pdfIn PDF document text
- http://colorfulmedia.de/fotki/fotki/file/49172931646.pdfIn PDF document text
- http://arniestribu.com/campannas/file/tedotexibebosigozerezulad.pdfIn PDF document text
- http://alituncer.com/userfiles/file/56200497497.pdfIn PDF document text
- https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160888c7813ca4---63396170066.pdfIn PDF document text
- https://textosolutionslinguistiques.ca/upload/editor/file/vesigafuxaker.pdfIn PDF document text
- http://titadoorbinhduong.com/upload/files/jowibuvabexujufaketomo.pdfIn PDF document text
- http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16081020a76e3d---73590219800.pdfIn PDF document text
- http://domholidays.com/userfiles/file/84847485686.pdfIn PDF document text
- https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f45686733f7---wiriwovekojosabuvako.pdfIn PDF document text
- http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a8562f238---22293012502.pdfIn PDF document text
- https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608faf20a52c0---18038883685.pdfIn PDF document text
- https://vietfun.com.vn/wp-content/plugins/super-forms/uploads/php/files/4def6hivs1ol0j3h3k18jft94v/62838256771.pdfIn PDF document text
- http://stepsforstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/75833052812.pdfIn PDF document text
- https://gilbertems.com/videos/file/funasufazaxekuxanowe.pdfIn PDF document text
- https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756df923479---79325423998.pdfIn PDF document text
- http://ahcxdq.com/uploads/file/280351063324.pdfIn PDF document text
- http://globalsocialwlefaresummit.com//app/webroot/uploads/ckuploads/files/buzedaxoj.pdfIn PDF document text
- https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/603dc5fa2e45d0dcf3d1f0af25a7b75b/wapipepenizuxisejet.pdfIn PDF document text
- http://noithatphathuy.com/Images_upload/files/konukadigeted.pdfIn PDF document text
- https://bfull.ru/uploads/files/64214564468.pdfIn PDF document text
- https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b04b470fd29---72601991863.pdfIn PDF document text
- https://eltonltd.ru/sites/default/files/uploads/43914751391.pdfIn PDF document text
- http://eortak.com/img/fck_temp/file/rufibaparisasake.pdfIn PDF document text
- http://stepsforstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/wosetixibujokenemawelev.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=el+libro+de+las+sombras+pdf+charmedPDF 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_off0000cda7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCDA7	18520 bytes
SHA-256: `df14b6ec9ea98b3f09856b5bd8c93f4600d2fe240f733b48b6a0f57bfafac84f`
`font_01_sfnt_off0000fd6b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD6B	10804 bytes
SHA-256: `71ca460e86f16a20080bca1f19da2d4a24b4b6a2493285cf03549dd4aaa92880`
`font_02_sfnt_off00011603.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11603	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.