PDF malware analysis — malicious · e947388178d6cfcb

MALICIOUS

PDF

82.5 KB Created: 2021-07-23 11:26:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22

MD5: 39fab0efef9bd6048db01344603a9b42 SHA-1: 1df09edea0528a79cff516b521177280a4cf7810 SHA-256: e947388178d6cfcbace0319a938d177e3bee029c9bfb138f102469813c249788

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external websites, many hosted on compromised CMS platforms. The presence of multiple unknown URLs suggests a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9924

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 http://teleinwestor.com/userfiles/file/sojipesabe.pdf In PDF document text
- http://studioboscono.it/userfiles/files/xopexabanapokemowi.pdfIn PDF document text
- https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/fm5it7j3bps0rkl85v0tjh61ks/gifebojebifibadifepusi.pdfIn PDF document text
- https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/87rckufnjjj03gb87cflauh426/87144408025.pdfIn PDF document text
- http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/bvbrd5dan8cp18vfppt010kqa5/bejijis.pdfIn PDF document text
- http://gongotour.com/FileData/ckfinder/files/20210614_B7FF706406FE83B0.pdfIn PDF document text
- http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7fd7eafe0---bafunerujobaxenatagoxizes.pdfIn PDF document text
- http://citescolairedeledit.com/include/file/1554311125.pdfIn PDF document text
- http://pnmanagementsolutions.in/uploads/63571678766.pdfIn PDF document text
- https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/a125iqe8brff54c3em96hrtnf7/gimolijisavodulewogodele.pdfIn PDF document text
- http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd8bfbc7d0---jifujinesoxofolatokugonav.pdfIn PDF document text
- http://billsky.ee/files/file/97718635575.pdfIn PDF document text
- https://mallncart.com/userfiles/files/5210250014.pdfIn PDF document text
- http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704ccab0136---wibujerusesonodigotaruzi.pdfIn PDF document text
- http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db1e0ace1be---dixobaxumuwadidekoxise.pdfIn PDF document text
- https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/011d543b56f6d47b45dd26f8c39f8c2e/madijafo.pdfIn PDF document text
- https://roweryelectra.pl/app/webroot/uploads/file/16244146388825.pdfIn PDF document text
- https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/2us1rj48hfu2ddjn9lr32v9lja/4230008000.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b13e5e128---gogegorijepowi.pdfIn PDF document text
- https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/0d8f382860b6dc378c155dba6194ef23/gemovijimog.pdfIn PDF document text
- http://afghansolar.com/userfiles/file/37903035646.pdfIn PDF document text
- https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe58b0849e---kewewanusegusugega.pdfIn PDF document text
- https://roweryelectra.pl/app/webroot/uploads/file/16219975038822.pdfIn PDF document text
- http://backupcenters.com/userfiles/file/femevopit.pdfIn PDF document text
- http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929f9e4de4e---31517747266.pdfIn PDF document text
- http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16094b0eb4d1f6---kepilumufogewovuralukes.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=gizmos+carbon+cycle+answer+keyPDF link annotation
- http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/ludobazemobolijovabata.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ca41.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCA41	16092 bytes
SHA-256: `9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd`
`font_01_sfnt_off0000df87.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF87	10824 bytes
SHA-256: `50e864fc01787648c6e8093ac55faa9cce22149f28678cf463e7692bbea96974`
`font_02_sfnt_off0000f8a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8A3	16292 bytes
SHA-256: `a5df71ddb152f77fdeea08472cb37b03089a99c1cb619e7a99d976dd7ef02c37`
`font_03_sfnt_off00012299.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12299	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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