PDF malware analysis — malicious · f8197e2a112ab0f5

MALICIOUS

PDF

81.7 KB Created: 2021-06-29 04:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: e14d5f995e4910fc6c6206724ca7f7e4 SHA-1: 22a6feb929bcab7d90da12d97462eadd6e5e641b SHA-256: f8197e2a112ab0f595d7fcb0cf935ccab6e7a50e85d774c28b73cd82fc493125

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to numerous external URLs, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

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://chcial.ru/uplcv?utm_term=frank+edward+all+song PDF link annotation
- http://shop-cartuning.pl/userfiles/file/64566730479.pdfIn PDF document text
- http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160945a9fdc5ed---60003057986.pdfIn PDF document text
- https://tenekedjieva.com/uploads/file/57363795191.pdfIn PDF document text
- http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b51c3115f0f---lerolag.pdfIn PDF document text
- https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/bj3f6g5ch7dtu6gpnoqihr42k9/86688751651.pdfIn PDF document text
- http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d7fe1043c2e---mesirapepumej.pdfIn PDF document text
- http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6e160454a---rutabu.pdfIn PDF document text
- http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b6862cccf---31967482213.pdfIn PDF document text
- http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac021643025---70235468096.pdfIn PDF document text
- http://evevoyance.fr/adh/.-/file/23185968555.pdfIn PDF document text
- https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/3mrm7ra75s400s28kv0l8llak2/68342751403.pdfIn PDF document text
- https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2ceecc2e9e---31474291369.pdfIn PDF document text
- http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/1mbp1hoaacpred6vaneij8bmkp/rudivitejafuzepo.pdfIn PDF document text
- http://beulahcooleycollection.com/clients/870349/File/zukovetewetaril.pdfIn PDF document text
- http://techbis.pl/files/file/zokazudiberoze.pdfIn PDF document text
- http://rocincorporated.com/domain.com/images/dynamic_pages/file/38444550905.pdfIn PDF document text
- http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/uh5l0a9rv7sgd8t6lssf96nvp6/56286901570.pdfIn PDF document text
- https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/qr65dtnbmt9ma1l4pl51cm51do/zadutiwobazef.pdfIn PDF document text
- http://andrelandberg.com/userfiles/file/7544299364.pdfIn PDF document text
- http://agrobud.net/uploaded/file/senabupizixexepujevevefe.pdfIn PDF document text
- https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/0e5668c7c809b67139d986cb66293fee/72113264866.pdfIn PDF document text
- http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098f78a9035b---16675261756.pdfIn PDF document text
- http://vietsonplastic.com/uploads/userfiles/file/fudifejafo.pdfIn PDF document text
- http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b53e7870a2---siwelumogovowiwok.pdfIn PDF document text
- http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1607358f98d685---75445289121.pdfIn PDF document text
- https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/b55afa1580c26fb274ddcd81cd7780eb/80543263633.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_off0000dc01.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC01	17112 bytes
SHA-256: `6273861f0cc9a2e31ef9ae1350d1e42da87be25b521b05dad0ca303b3358cdd4`
`font_01_sfnt_off000108c5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108C5	10388 bytes
SHA-256: `423b20661e665290c1f0dfedae57457ebedc4b75d14cadcff57be5e0644d26f5`
`font_02_sfnt_off00012038.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12038	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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