PDF malware analysis — malicious · b9fb9ac92ef137aa

MALICIOUS

PDF

86.4 KB Created: 2021-07-08 10:37:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 971c04758c1b753577b0de422fb6fa2e SHA-1: b808eb700c1866b9abe93125fba875848be1459d SHA-256: b9fb9ac92ef137aabbd89118dac61b76eab31973a2951ee0f8ac7661dcc044fe

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 as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely intended to lure users into downloading further malicious content or submitting sensitive information. The presence of multiple external URIs and compromised CMS upload links strongly suggests a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://philabc.ru/uplcv?utm_term=what+supreme+court+decision+established+judicial+review PDF link annotation
- https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160905ea29a189---surugulagubifelasete.pdfIn PDF document text
- http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b49eddc3f38---zelesoze.pdfIn PDF document text
- https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa55b1a6bd---foginagugagasezem.pdfIn PDF document text
- https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/48bf6bf0805401dc13421d8cbfb2d706/36909418732.pdfIn PDF document text
- http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160975e6430500---87001036771.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc086232541---2716007544.pdfIn PDF document text
- https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da1ebea1e4---vutizologapogisaludutato.pdfIn PDF document text
- https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/86c88fcf2ff3a9e5963b8c1bb7c5be7e/15866941277.pdfIn PDF document text
- https://arerp.kr/data/file///newov.pdfIn PDF document text
- http://aaykpn.com/uploads/editor/files/70184440823.pdfIn PDF document text
- https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/ecd9f29a52a5df11f8a74605e9a1cb03/22408642719.pdfIn PDF document text
- https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/eunt4ieslbp8obecdofchdtlaj/76198873949.pdfIn PDF document text
- http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/67265488443.pdfIn PDF document text
- https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/5074cbefc1540a01052e85e3e350bd9b/judidibugaxawezij.pdfIn PDF document text
- http://alpha-th.com/userfiles/file/60775639677.pdfIn PDF document text
- https://allcreaturesinc.com/files/files/kofipolen.pdfIn PDF document text
- https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985a28e7794---nisenorukexabopipudatur.pdfIn PDF document text
- http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160958bf10a61e---morejaso.pdfIn PDF document text
- https://lapalettedesarts.fr/gestion/file/47883022716.pdfIn PDF document text
- https://deepex.hu/hirek/files/21342383723.pdfIn PDF document text
- http://rotang.net/userfiles/file/81460301649.pdfIn PDF document text
- https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/hlkn0s19luphqcprj9v9qipea9/99891726538.pdfIn PDF document text
- http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607432aeb714f---gedove.pdfIn PDF document text
- https://unique-u.biz/images/uploads/file/baxuze.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_off0000eb4e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB4E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010365.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10365	11296 bytes
SHA-256: `18e7dadc450281ad7f88ccdb32c790512ef08b410a67d3346ba72e7ec9bac8a4`
`font_02_sfnt_off00011d89.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D89	17748 bytes
SHA-256: `00c7bb5b93fa6dd36cf760c69d925790f9733634e91614e1cdf10baec24d326a`

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