PDF malware analysis — malicious · e8524a83b19d338e

MALICIOUS

PDF

80.6 KB Created: 2021-09-01 20:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 2401c1294bb102685c1b752c3728ab44 SHA-1: 39517acdb972bf9479ff8fc9739209c1add0c858 SHA-256: e8524a83b19d338ec25c77fc7430c18cbd3fa0b5e0ef9e2da7c69c3c1fab8918

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress upload directories, suggesting an attempt to host malicious content or redirect users. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a non-clustered link farm on disposable hosting, further supporting a malicious intent to distribute harmful content or phish users.

Machine Learning

Nyx PDF Classifier malicious score 0.9916

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://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/161264e4307780---wavagazulono.pdf In PDF document text
- http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1it5eri787la757l7loo2ljt86/xowodowewenosanagadidex.pdfIn PDF document text
- https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945d7dd7b25---80857007784.pdfIn PDF document text
- http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105bba3c0e74---pinibonaviwixoguwe.pdfIn PDF document text
- http://seamacros.com/upload/file/9624044243.pdfIn PDF document text
- http://remont-etalon.ru/upload/files/47951923939.pdfIn PDF document text
- http://hangquangauto.com/files/dokijiremojikorofufaw.pdfIn PDF document text
- https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/hrgdtsdk9snp9fvl20qmcmksl3/butanokesutupexumaxaxo.pdfIn PDF document text
- http://zzweien.com/d/files/25302245749.pdfIn PDF document text
- http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/cvr7au142grq6bcq3un8ioo8c7/28996930256.pdfIn PDF document text
- https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/gkbsmnrq93ncmsmllfrfqppas4/2973774643.pdfIn PDF document text
- https://cpsguffanti.it/uploads/file/xapikevivoxokaxatewifezi.pdfIn PDF document text
- https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/868b351a3a0146b0ddab3791e80ce100/62804738307.pdfIn PDF document text
- https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/pid6cctge1k1m0bacj1ggt489s/lujezivozopog.pdfIn PDF document text
- https://angkalaris.com/contents//files/79324619752.pdfIn PDF document text
- http://synowka.pl/galeria/file/lupujenuzaxodigedav.pdfIn PDF document text
- https://lacaune.hu/userfiles/file/48242378763.pdfIn PDF document text
- http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c72efcddc80---38637252919.pdfIn PDF document text
- https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/d17e0af9ced305db7386cd6f5c4dd078/wonatixabadizepopirudaba.pdfIn PDF document text
- http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c95c51aaed---26107509530.pdfIn PDF document text
- https://mobilieroccasion.fr/uploads/file/ximakumagona.pdfIn PDF document text
- http://enjoybowlramenandpoke.com/uploads/files/11381384436.pdfIn PDF document text
- http://ikhmongol.mn/ckfinder/userfiles/files/lipigavovozut.pdfIn PDF document text
- http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9818f2ac8---4830471415.pdfIn PDF document text
- http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c3b2534b437---bamivarejanosirojodu.pdfIn PDF document text
- https://www.aaptuk.org/ckfinder/userfiles/files/pumobikegavoba.pdfIn PDF document text
- https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/febe8bdee4ff6b5ff2e07ae408f5cde9/nanedebew.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=a+parallelogram+with+four+congruent+sides+and+four+right+anglesPDF 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_off0000d0aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD0AA	11232 bytes
SHA-256: `c7b755d285addb5cd73b7f19863dc963718631cf1cc29a2bb19cbe6eed37f377`
`font_01_sfnt_off0000eab5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEAB5	18096 bytes
SHA-256: `e2a2421bed9301de52d1c35c0e29e5f03e6b7ebfb8d5ddd1a11b6ddc0286a270`
`font_02_sfnt_off000119b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x119B9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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