PDF malware analysis — malicious · 46c57dee38b5c908

MALICIOUS

PDF

124.5 KB Created: 2021-08-12 12:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: d9e78bebe5b8199de71491f5483d4ba3 SHA-1: 0cc4d0b5e47673ac3b7eda92d49d643004d0eade SHA-256: 46c57dee38b5c9089d1630563f69eed171a7793080df459954a2c8c07b841a15

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, embedding numerous URLs that point to compromised CMS uploads and disposable hosting. These links are likely used to redirect users to phishing sites or download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9960

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://huntic.ru/uplcv?utm_term=how+do+you+make+a+flower+in+toca+blocks PDF link annotation
- https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/81cc5acf01ef3352f53a59638af7c91d/41276200981.pdfIn PDF document text
- http://tlxzkj.com/uploads/file/261954225049.pdfIn PDF document text
- http://hevolta.com/upload/file/50992092716.pdfIn PDF document text
- http://walker-doss.com/clients/4/45/450b4a4af5ff3f13851793278d9c7ef8/File/53956926408.pdfIn PDF document text
- https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/eb970323d591c3c670c515bbf6b72ed1/69966960380.pdfIn PDF document text
- http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608143dc48e59---budanu.pdfIn PDF document text
- https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/83c9q3jhl33o7nnplvd81n8sig/12570158454.pdfIn PDF document text
- https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/239247925dfbddc14ad295a8dbb75673/57913457101.pdfIn PDF document text
- https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d13e9babc0---tadomidovufidekanavew.pdfIn PDF document text
- https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/qbirn0m2oom8iool98cufr5lqp/venujalinojegefo.pdfIn PDF document text
- http://allseasonsart.com/uploads/fck_uploads/file/32792159679.pdfIn PDF document text
- https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/282e1677d954e7e66ac15af6f0f26d6e/lefujirepetov.pdfIn PDF document text
- http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805278b698d---17427497374.pdfIn PDF document text
- http://nacyc.jp/Upload/file/88874106895.pdfIn PDF document text
- http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/7a1c0e96c15580e6631de24b9a2eae1c/30189359786.pdfIn PDF document text
- http://ptairsupply.com/userfiles/file/90607020880.pdfIn PDF document text
- http://jgbt.us/pds/userfiles/files/legulixupenemipanurutef.pdfIn PDF document text
- https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/bb1f41d9be5bf26089d6f50f57cfe315/gumasokevaloluwukatazenug.pdfIn PDF document text
- https://ratco-hardware.com/Ups/files/lexikunevesirod.pdfIn PDF document text
- https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f5b9cdaa887738d265d807626fc3bbd1/mivujipamikeborev.pdfIn PDF document text
- http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e2ab4b95b---tudovuzez.pdfIn PDF document text
- https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097dad3cd786---4999758747.pdfIn PDF document text
- http://fandimnarodaku.cz/upload/file/54036395796.pdfIn PDF document text
- https://aduanaldelvalle.com/userfiles/file/lulufokenileke.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00016ac3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16AC3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000182d5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x182D5	20944 bytes
SHA-256: `6478f3d18a27188e5b04b39d44d1a5fb38a98acc0242350b760e2e5351c845d8`
`font_02_sfnt_off0001b75e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1B75E	4560 bytes
SHA-256: `8f177d4120691ddc025099992d3c43499b07ae36ccbb6b784d47962247c38728`
`font_03_sfnt_off0001c87a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1C87A	11160 bytes
SHA-256: `4324dc6099f5a24884da93043e167821736b2bca204bfc66b328b48a5a52983c`

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