PDF malware analysis — malicious · f4cfdd16d925b1a9

MALICIOUS

PDF

75.9 KB Created: 2021-09-02 02:02:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: a490759bb06fdc92b35e859fc83d3ad7 SHA-1: d4acde3f576bcf81d9056625a30959388813e8ba SHA-256: f4cfdd16d925b1a961d80d80ab6d22bc7ea80c7e17ada386b8b59ff45bdaf8e8

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 a machine learning classifier indicated a high probability of maliciousness. The file contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true destination.

Machine Learning

Nyx PDF Classifier malicious score 0.9976

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://aldea.work/wp-content/plugins/super-forms/uploads/php/files/d7446293dd24e79bb1dcbfa0cfc90785/99042969546.pdf In PDF document text
- http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160cff36e90730---49471259407.pdfIn PDF document text
- http://tourister.kr/userfiles/file/84525915072.pdfIn PDF document text
- http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b99ac38254---tipafarirafug.pdfIn PDF document text
- http://pyramidplaster.com/file_media/file_image/file/xarizepadumirukexu.pdfIn PDF document text
- https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca1a11a15b---nedoviwutakorafaxanamosa.pdfIn PDF document text
- https://harom.ro/files/file/furuzawoxof.pdfIn PDF document text
- http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0812b0628---64326539391.pdfIn PDF document text
- http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d322d5ec71---7389261434.pdfIn PDF document text
- https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/fecd6e5587dc8d29a1001ebdec0ce03d/valeja.pdfIn PDF document text
- https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff9a16e20d---51400221391.pdfIn PDF document text
- https://aadhaarretail.com/administrator/imagetemp/file/romimosagulenemisobe.pdfIn PDF document text
- http://spzpoz-zdunskawola.pl/upload/file/30344846938.pdfIn PDF document text
- http://a2itsolutions.com/chop/multimedia/userfiles/file/9307099073.pdfIn PDF document text
- https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/22968331083da7daf68af13674167255/85822826403.pdfIn PDF document text
- http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e22bc1cea3---74193270082.pdfIn PDF document text
- https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/8e20729cb89133be9a2a63b06aeccf71/zapujaripato.pdfIn PDF document text
- http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1a872ff8e---laxonaduvubil.pdfIn PDF document text
- http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d7e9818cc---bamexobefosiwe.pdfIn PDF document text
- http://diysmart.net/userfiles/file/45611389008.pdfIn PDF document text
- https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/8f57454d2fa378ac7faf9856c101e158/fekeve.pdfIn PDF document text
- https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/a54ab088da2526de347b44975d4e4c6e/87025580797.pdfIn PDF document text
- http://krajinar.cz/soubory/files/1269869617.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=ap+literature+and+composition+free+response+questionsPDF 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_off0000c5a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC5A9	16468 bytes
SHA-256: `0c74ab0a3c13d4a1bf287e901cc640bde5366d66530cbce6fffa7da0a39e0a22`
`font_01_sfnt_off0000efdc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFDC	11008 bytes
SHA-256: `29739e85a772b7c52333b2185de8822e9118530e10e9621c54f392399efb26e8`
`font_02_sfnt_off0001093f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1093F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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