PDF malware analysis — malicious · b10612058ff4b4d2

MALICIOUS

PDF

133.1 KB Created: 2021-06-29 03:09:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 088266aaba248641b5b7fca93ef24503 SHA-1: df6eafa3cb1486bc017b11112883c44d79d50d9b SHA-256: b10612058ff4b4d2d1be07dc98a097cf52b644c3473e5cf5545b19db6bd4ba4a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The primary purpose appears to be directing users to potentially malicious external sites, likely for phishing or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9768

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://cructi.ru/uplcv?utm_term=hyperspace+star+stuff+worksheet+answers PDF link annotation
- http://pressvaluation.net/userfiles/file/zezibovi.pdfIn PDF document text
- https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/8c6b0555740c645bad4ecde4ddf6997f/53741519385.pdfIn PDF document text
- http://jtylek.pl/Upload/file/15431730656.pdfIn PDF document text
- http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a9be9bb5ce7---lisokubude.pdfIn PDF document text
- http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/814d4c46bd066632804244be239c3fac/zosem.pdfIn PDF document text
- https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b16af6329e7---82821326166.pdfIn PDF document text
- http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160996127b1f0c---riluxudokunovuraxofate.pdfIn PDF document text
- http://tuclubcr.com/campannas/file/voralawenonomimiduvovi.pdfIn PDF document text
- http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072d77474245---86037244807.pdfIn PDF document text
- https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/2752fc4f488eecf3aa62717d1fa21f2a/vabonowejobugufukitifapo.pdfIn PDF document text
- http://schokobrunnen.com/idata/50182585748.pdfIn PDF document text
- https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/2af7facfb52e70403b0c2280eec54d34/87492004902.pdfIn PDF document text
- http://go-pxl.com/uploads/files/mobew.pdfIn PDF document text
- http://bielwod.com/userfiles/file/silow.pdfIn PDF document text
- https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0af58ceaa24c0530a5afd7dbc52155d5/xilitozeve.pdfIn PDF document text
- https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/f6d631d83cfa87ad7509a09f74460ba2/97829272990.pdfIn PDF document text
- https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/f505c276ea62e48ac670b0b6b46712c3/53611816868.pdfIn PDF document text
- https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb90d3aa86---24638878306.pdfIn PDF document text
- https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0194700e48d09093599d944ac4cc3af2/japamukegixeloj.pdfIn PDF document text
- https://sca-kc.com/scauserfiles/files/79970825721.pdfIn PDF document text
- http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b210297703f---jovetarefosenetafuta.pdfIn PDF document text
- https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2c2d3440d---94872852364.pdfIn PDF document text
- https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096121081ba3---55141123885.pdfIn PDF document text
- http://perlawarmii.pl/userfiles/file/8546009918.pdfIn PDF document text
- http://effektfilm.de/files/file/baxomatuwe.pdfIn PDF document text
- https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/b862b8040c04bc7a0bb6337ab1658564/voxusaronikiwumijupagujov.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_off0001a7eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1A7EB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001bffd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1BFFD	17620 bytes
SHA-256: `4a3fe5e8024dae971a7dc3233c9c46ee0fb80e799c4ee4ef0586c9fa5e83e39d`
`font_02_sfnt_off0001ed31.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1ED31	10824 bytes
SHA-256: `4519d115125665b035bfe59bbe61239dac542df7aedf90f5e729078d8db083dd`

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