PDF malware analysis — malicious · 4280e1a1d67e9702

MALICIOUS

PDF

95.2 KB Created: 2021-07-05 21:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 2f2a8003a4e6775df127be715954aec6 SHA-1: c7633867d2d67a4da3548f3f5c13e0d66668a096 SHA-256: 4280e1a1d67e9702e871ddfb7068533752407291a629f5e904b4a11db7abbdcf

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded URLs align with common tactics for distributing malware or conducting phishing campaigns.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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 https://coretry.ru/uplcv?utm_term=3+responsibilities+of+a+citizen PDF link annotation
- https://cepatdaftargroup2.com/contents//files/78141704758.pdfIn PDF document text
- http://healingtown.org/userData/board/file/61397118274.pdfIn PDF document text
- http://3wsystems.com/shipinc/userfiles/files/93013556558.pdfIn PDF document text
- https://villatoscana-pi.it/userfiles/file/ruvuwasikivilipenu.pdfIn PDF document text
- https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/e2a0539181f6cd0fee95e3aa3a9f6ee6/donoro.pdfIn PDF document text
- https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9717bfc3d---3501015492.pdfIn PDF document text
- https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160796be1b7563---99210643108.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e2fa741aa---60564903190.pdfIn PDF document text
- https://fotoprint.lv/downloads/file/47176227288.pdfIn PDF document text
- http://gospelinamerica.com/clients/874377/File/lewulevifevir.pdfIn PDF document text
- http://netmutum.com/userfiles/file/22763955217.pdfIn PDF document text
- http://a2itsolutions.com/chop/multimedia/userfiles/file/relogowofolom.pdfIn PDF document text
- http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9e2a0c7a9---perekawapefu.pdfIn PDF document text
- https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/fb9ce4a2501794097bca9868738d2d1c/fiwutagifim.pdfIn PDF document text
- https://ludifrance.fr/userfiles/file/bumigobovujelefibefimamew.pdfIn PDF document text
- http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608589efb48cd---rugiviwufomo.pdfIn PDF document text
- https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/4t24gh0j2jo7egcdh5js1a5a52/muzupuvuperap.pdfIn PDF document text
- http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c1f2e2a36---walumujoj.pdfIn PDF document text
- https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bdcea404f7a---5478947566.pdfIn PDF document text
- http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e847863653---javuwi.pdfIn PDF document text
- https://hanul-muresenilor.com/wp-content/plugins/super-forms/uploads/php/files/pfuferhphhbftsk2ksq7qjq8s3/3118486340.pdfIn PDF document text
- http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f13d5d6723---68622633802.pdfIn PDF document text
- http://uleshuzatshop.hu/files/file/diwoponat.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_off0001108b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1108B	17656 bytes
SHA-256: `1a19cff9d476fa8cf1c01407439959d0968c4ba3f5e8e7d6f5506f7a21d2734a`
`font_01_sfnt_off00013f08.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13F08	10748 bytes
SHA-256: `7e9ccdb6ee602ba90f6989faa177b5edf54b334849d36e94928c10f3e548c5ed`
`font_02_sfnt_off000157b0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x157B0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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