PDF malware analysis — malicious · 6ecceebff9d04a8d

MALICIOUS

PDF

77.6 KB Created: 2021-07-14 01:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 714fa85203271488bf263266aa6eece5 SHA-1: c2c1338cf28b017cc417b86e28c36fe3d68bafc2 SHA-256: 6ecceebff9d04a8d4ebaf86d8a85c26c6aafdebff7773cb956c0b7e1879df900

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. It contains numerous links, many pointing to compromised or disposable domains, suggesting a link farm designed to distribute further malicious content or manipulate search engine results. The presence of multiple distinct hosts and a high number of PDF links indicates a coordinated effort to host and link to malicious files.

Machine Learning

Nyx PDF Classifier malicious score 0.9827

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://olympusflights.com/files/files/70588427686.pdf In PDF document text
- http://kleinschaden.expert/userfiles/file/mopotewivuvamajawefigola.pdfIn PDF document text
- http://tatishev.ru/admin/ckfinder/userfiles/files/zitonetakekibesato.pdfIn PDF document text
- https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b90003557cd---71751659601.pdfIn PDF document text
- https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/9c9209f7880357f526a3e5f873d21831/35070258040.pdfIn PDF document text
- http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad7bc411d4---fosagoboxepomimuk.pdfIn PDF document text
- http://allycatering.com/userfiles/92173080129.pdfIn PDF document text
- https://shen-su.eu/gfx/userfiles/files/81478402742.pdfIn PDF document text
- https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/46f4811a04288a2bcad019d425eaca0a/tevudaridurorojutezezupof.pdfIn PDF document text
- http://sl-light.ru/design/img/upload/file/lepumofazawokufuniresama.pdfIn PDF document text
- https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1932999bf7---fedikomu.pdfIn PDF document text
- https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/5fb71ebf69da275657164e93199bf789/xuxibawilipike.pdfIn PDF document text
- https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb8ca86087---31143218720.pdfIn PDF document text
- https://pjkconstruction.ca/images/file/zalorejataxokerukipatoge.pdfIn PDF document text
- https://aquafilling.com/userfiles/file/66868091093.pdfIn PDF document text
- http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160772768ea19f---60688426082.pdfIn PDF document text
- http://thaiboxes.com/piceditor/file/16775231495.pdfIn PDF document text
- http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609bcf199abe9---pidasolokogoza.pdfIn PDF document text
- https://zold-kommando.hu/files/75451454608.pdfIn PDF document text
- http://valeneighbors.com/userimages/xokalosowerebarapubedaka.pdfIn PDF document text
- http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608405481ea3f---desobigog.pdfIn PDF document text
- http://andlupa.com/userfiles/file/88484859067.pdfIn PDF document text
- http://phuclocvienjsc.com/uploads/image/files/taranawe.pdfIn PDF document text
- http://adance0112.com/upfile/editor/file/kadosagiwufanudurik.pdfIn PDF document text
- https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/80b88674ac1bec8a7056179bbcb6ec87/fevupalawugezesure.pdfIn PDF document text
- https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/9chsgcafquiup4tg00e9ojbhvc/57838438935.pdfIn PDF document text
- http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071115345b59---57957399303.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=strength+of+materials+by+rk+rajput+pdf+filePDF 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_off0000caec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCAEC	16516 bytes
SHA-256: `1c88ac291310620a542297d8aa26fbc11f44cefd9445e9113f46b43c969c4e86`
`font_01_sfnt_off0000f5dd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5DD	11596 bytes
SHA-256: `f04ff4478b01710a6ce7088fed9130582c011253c8b6b3a63797f2b512631f90`
`font_02_sfnt_off000110bb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x110BB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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