PDF malware analysis — malicious · 8cde702d1d564689

MALICIOUS

PDF

72.0 KB Created: 2021-09-18 15:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: c3e75f53dde95d50cbed9c27cbd3764d SHA-1: 0e6136c8a72d87661590f1ca1c6cd2ebf0dd6465 SHA-256: 8cde702d1d564689a391ef686d9b822fbfa6f8d657373ba0277596e8b046a86a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress upload directories. The presence of these links suggests an attempt to lure users to potentially malicious sites for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9840

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 https://pistant.ru/uplcv?utm_term=free+fire+mod+apk+unlimited+diamonds+download+for+android PDF link annotation
- http://datacomsystems.cz/userfiles/file/pevavo.pdfIn PDF document text
- http://foxhill101.com/userimages/96701976813.pdfIn PDF document text
- http://alothongtin.com/upload/FCK/file/96025091151.pdfIn PDF document text
- https://studybrilliant.online/app/webroot/img/userfiles/file/97456436446.pdfIn PDF document text
- https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16140e5aa89b36---xapanogubolanasu.pdfIn PDF document text
- http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/wejezuwixopovusif.pdfIn PDF document text
- http://cbestdesign.com/ckfinder/images_store/files/97976020633.pdfIn PDF document text
- https://redengewinnt.com/userfiles/file/foranezesevejetizotage.pdfIn PDF document text
- https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/161329dd82be76---ditujazop.pdfIn PDF document text
- http://xn--42cfa4ewb0a0b3fwh.com/imageupload/files/ledinexezerebu.pdfIn PDF document text
- https://abzesolar.com/uploads/files/wuluwitut.pdfIn PDF document text
- http://campfirewtx.org/userfiles/file/58027418335.pdfIn PDF document text
- http://synergyproperty.com/images/files/midixifibuw.pdfIn PDF document text
- http://finalbrand.cz/upload/file/77808389695.pdfIn PDF document text
- http://silesiacapital.eu/data/file/mufunilane.pdfIn PDF document text
- https://valergences.fr/userfiles/file/48340163464.pdfIn PDF document text
- https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e935d27913---jelejosadug.pdfIn PDF document text
- https://tennis94.fr/img/pics/files/56966054764.pdfIn PDF document text
- https://culturasiapamplona.com/guiarte_userfiles/files/87881537010.pdfIn PDF document text
- https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/47427058909.pdfIn PDF document text
- https://skopjemuzikon.pmgrecordings.com/ckfinder/userfiles/files/31536942768.pdfIn PDF document text
- http://hebakotb.net/userfiles/file/53879960303.pdfIn PDF document text
- http://nieruchomosci-swidnica.pl/userfiles/file/buwototazomisinu.pdfIn PDF document text
- https://itandem.net/ckfinder/userfiles/files/dezudubiw.pdfIn PDF document text
- http://31kouqiang.com/userfiles/file/1631297988.pdfIn PDF document text
- http://cappellastudio.it/userfiles/files/42162419977.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_off0000b84e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB84E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d065.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD065	10912 bytes
SHA-256: `062b644e51d9de12a10f019f38bb7edfee6a54e27f838a864bc75fa1069c0a99`
`font_02_sfnt_off0000e9a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9A3	15848 bytes
SHA-256: `29c6266cf01be2e66f8a953ce1173da51cef041c35a8dc2b794f72cb5252280f`

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