PDF malware analysis — malicious · 410e7cae01f6be7c

MALICIOUS

PDF

86.9 KB Created: 2021-07-02 03:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: c422f141a02ae0fef7972c5e0a0fee93 SHA-1: 949bd131a7d8053894097d5215c424bff0117f4c SHA-256: 410e7cae01f6be7cd5e7afca6b72120185e4dce7e304e733ce22460ae3c7ec84

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. The heuristics indicate it functions as a link farm, directing users to multiple external websites hosted on potentially compromised or disposable domains. No scripts were extracted, but the presence of numerous embedded URLs suggests the primary intent is to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://dent-pro.cz/pic/file/23888401966.pdf In PDF document text
- http://commune-bourre.com/userfiles/file/fugozizetuxuk.pdfIn PDF document text
- https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/75f1ac8d6fa19ecb83d2d8c5cbd1ff78/visozuzupubetezateradug.pdfIn PDF document text
- http://seoulmenu.com/uploads/files/rikil.pdfIn PDF document text
- https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/fa92e6540c553246ebbfff6bb7a79045/rotapovovuvogidexepe.pdfIn PDF document text
- https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9d3ad3c3c---kujixuzevikozubejazolaneb.pdfIn PDF document text
- https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/b20a2274e95466759df1232d75bca189/9820190366.pdfIn PDF document text
- http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e24269b38e---62497270581.pdfIn PDF document text
- https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/38d0ba08271e0eb11d288c84151461f5/72812904897.pdfIn PDF document text
- http://accessoriesunlimitedinc.net/catalog/file/76400029397.pdfIn PDF document text
- http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160784a7be0c61---54029664291.pdfIn PDF document text
- https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/65733ce022a616289afcbe42075aba54/fivupe.pdfIn PDF document text
- https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cd164ce7002---14288925427.pdfIn PDF document text
- http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d06da490517---90331514136.pdfIn PDF document text
- http://amdind.com/userfiles/file/26925283605.pdfIn PDF document text
- http://forresterfamilyreunion.com/clients/c/cc/cc72bfd2512333311cc1ef5a4fdef90f/File/fagofezofimotafagum.pdfIn PDF document text
- https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160996ced7586f---77187293891.pdfIn PDF document text
- http://aaaexpressheating.com/userfiles/file/nejozoteki.pdfIn PDF document text
- https://limblength-sldf.com/userfiles/file/sivanimafepegis.pdfIn PDF document text
- https://ubranni.com/uploader/files/nofubaletajefugojazimile.pdfIn PDF document text
- https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0c12d2ad7---ziwagojesebalobukafeb.pdfIn PDF document text
- https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/6fe7cd22e0f5390d67b762bf9aa858bf/koluzetowatoxobukojigo.pdfIn PDF document text
- http://megalabsrl.it/userfiles/files/56046796027.pdfIn PDF document text
- https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/69oerrd1ref5fgmj82m6v1b9r1/simisitoxavufepum.pdfIn PDF document text
- http://ytbozhuo.com/upload/file/171830321568.pdfIn PDF document text
- https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/2m2h3qi2g5kcpu0suqjeu5q5jm/tabigusedapet.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=blacking+out+from+anxietyPDF 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_off0000efed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFED	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000107ff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107FF	17480 bytes
SHA-256: `d2b881762cf624566491a309d99e97b623ad4aa82f02ffade080878f27a7db6f`
`font_02_sfnt_off000135d1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x135D1	10972 bytes
SHA-256: `dc4a89a79a4275bca7d15ef41cb0c330e63cc7369437bdf6f7aa2649b98f7db0`

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