PDF malware analysis — malicious · bb0b8cc83f83a0bf

MALICIOUS

PDF

85.9 KB Created: 2021-07-19 10:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 76cbed801a15f2470ee36e00bc4b4b40 SHA-1: cfe75e986b94882926207fb5fd091589b967e0bb SHA-256: bb0b8cc83f83a0bfd42a3760cc55961cde0f100b1d03316039f505c6d9ff24b8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, with the latter identifying it as a phishing trojan.

Machine Learning

Nyx PDF Classifier malicious score 0.9848

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 http://radfordhsclassof1970.com/clients/878146/File/83057896291.pdf In PDF document text
- https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a29600d9e8---73430349529.pdfIn PDF document text
- https://gyn-koe70.de/obrazky/file/kawirigekelo.pdfIn PDF document text
- https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/8c77fc7e97962559c96e6127359175ae/61560150356.pdfIn PDF document text
- https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/bba211d0bcc585a8b9872a1504cdae52/26933714947.pdfIn PDF document text
- https://bczenekar.hu/files/file/vepapiwubodilowesowa.pdfIn PDF document text
- https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/e060641d30252d78ca4afad812fb73d2/vapopefisitabuvidaxebu.pdfIn PDF document text
- http://naturallabs.fr/userfiles/file/93221536304.pdfIn PDF document text
- http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8100b56265---vuvofifevavuwasusuxaku.pdfIn PDF document text
- https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/fe6ca4973836f188897f9bcb1a0deb44/10071332450.pdfIn PDF document text
- http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/29501484379.pdfIn PDF document text
- http://www.derbysignandgraphics.com/uploads/file/jexapapatitomewuwibe.pdfIn PDF document text
- http://www.europesolidaire.eu/userfiles/files/kiterimupozosozejibufo.pdfIn PDF document text
- http://fxmeat.com/upload/file/5f80e5da31a42a44bea9bd8002cd1dd9.pdfIn PDF document text
- https://edarky.net/data/file/ganimixumugusakoxetus.pdfIn PDF document text
- http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aea15300e4e---95371126451.pdfIn PDF document text
- http://aggengr.com/uploads/CMS/file/59368446575.pdfIn PDF document text
- http://arci-mp.fr/admin/File/sanet.pdfIn PDF document text
- https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/s5be1749tbkdhsq62udtf5gsi7/5487380494.pdfIn PDF document text
- http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d1b4d5c5b---74440392291.pdfIn PDF document text
- http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a93e1d6349c---87180261146.pdfIn PDF document text
- http://studioego.cz/userfiles/file/woxolirekoferebizaf.pdfIn PDF document text
- https://anakmeong.com/contents//files/35833380613.pdfIn PDF document text
- https://muachungbaohiem.com/uploads/userfiles/file/1436324072.pdfIn PDF document text
- http://kiuanai.com/userfiles/file/tenoremifuwapowexabalitu.pdfIn PDF document text
- https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160cacb363ac7b---34142864939.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=define+case+tools+in+software+engineeringPDF 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_off0000eb66.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB66	10600 bytes
SHA-256: `abc2d85eaf165ce0d5c8dde964fbd1caf9fb061a1ffbf7d792ceaa8d80989e31`
`font_01_sfnt_off000103db.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103DB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011bed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11BED	17484 bytes
SHA-256: `229b7cfa02c02589c56082c136ab902f522cdd364723f2cfb102869c687a7911`

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