PDF malware analysis — malicious · 2e8755f00ae63bb1

MALICIOUS

PDF

91.9 KB Created: 2021-06-30 07:11:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 1e7a31ee08e35b79b22a14b96e181215 SHA-1: 44469a9e22522c057ad71f8a3b6f31c12208158c SHA-256: 2e8755f00ae63bb1cefd8a8869d208f53daeec7f4f90c1fa44a00e6cf3bf16a4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm directing to numerous URLs, many hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

Nyx PDF Classifier malicious score 0.9820

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 http://kirakuramenandsushi.com/uploads/files/9194293804.pdf In PDF document text
- https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088abb271d84---zodujobitefimevomobuz.pdfIn PDF document text
- http://elturo.ru/img/upload/files/9488623425.pdfIn PDF document text
- https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8e4f24b1f---48787588053.pdfIn PDF document text
- http://work4shop.cz/userfiles/file/17828392882.pdfIn PDF document text
- https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3c3c0bb32---seboduwasawusezokapiw.pdfIn PDF document text
- http://school19-zav.ru/userfiles/file/ridezovumidilafula.pdfIn PDF document text
- https://hometeamcorp.com/images/usr/46940486667.pdfIn PDF document text
- https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/2529a3781cdd4728f6216351d739fc50/65626495410.pdfIn PDF document text
- http://cortabellanews.com/userimages/xejexogan.pdfIn PDF document text
- http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a639cd2d9e0---89799367858.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4b858228b---99118749330.pdfIn PDF document text
- https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/fe8e89d1e1d4a7d2593e6c9df7e5f196/47373198725.pdfIn PDF document text
- http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/fe86b273b0cdea48d6aa00d5565128ad/divenegazemeve.pdfIn PDF document text
- http://galettedesrois.hu/userfiles/file/91793842876.pdfIn PDF document text
- https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/c40a0ed5803b42352f0c6f32db114907/tapafetarap.pdfIn PDF document text
- http://amsasecretariat.fr/userfiles/file/bironifufamowinesivuwod.pdfIn PDF document text
- https://avgdesign.com/userfiles/file/fozomemasap.pdfIn PDF document text
- https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b524d709942---93569401875.pdfIn PDF document text
- https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8dd5b3a29a---87611198072.pdfIn PDF document text
- http://www.abcklima.hu//data/editorfile/50533564515.pdfIn PDF document text
- https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b29cc32953---vevuxetexopugej.pdfIn PDF document text
- https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/d1b00e757550acf0e864f2f7425be0e6/xekiw.pdfIn PDF document text
- https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/r4og5n4jfjcbop6ivilo5i83bv/2316009203.pdfIn PDF document text
- http://agcslohian.com/userfiles/file/91061875833.pdfIn PDF document text
- http://ttc-investco.com/img/files/15183533509.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=computer+science+maths+topicsPDF 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_off000104ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104AC	17212 bytes
SHA-256: `c37a9807a31cc644a3c0dce2a16f1664fc008ae0404bc70f0eb20547c63dc5a8`
`font_01_sfnt_off000131af.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x131AF	10724 bytes
SHA-256: `9286636e8ba6c9b11587bfc5534de0ff1b588902fa1b815234c1c9151c5da42f`
`font_02_sfnt_off00014a28.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14A28	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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