PDF malware analysis — malicious · 4f84f93c4ff629a8

MALICIOUS

PDF

77.8 KB Created: 2021-07-05 15:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 7420235b0aa1367707ade6e176007686 SHA-1: 07afff28c71a703200f2596f8eeedabc9ddcdef4 SHA-256: 4f84f93c4ff629a8b38f05a91470a9de75559b380fea14b93f2d92c8a4cef163

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. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

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://smidgel.ru/uplcv?utm_term=corresponding+meaning+in+tamil PDF link annotation
- http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc909e8a05---63086918940.pdfIn PDF document text
- https://tomas-music.com/contents//files/62704705801.pdfIn PDF document text
- https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/b8f99ddcae52d7fd7a279cb4be6230d3/viwejolatomemavobuk.pdfIn PDF document text
- https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160984464e7b25---jilopesabatub.pdfIn PDF document text
- http://jucal.es/images/file/jilejokitamapudumeboweko.pdfIn PDF document text
- http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609df2309d295---57182038512.pdfIn PDF document text
- https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0a9273639---71809187423.pdfIn PDF document text
- https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087aa9e61e6d---48529904761.pdfIn PDF document text
- http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982e304e328---gelige.pdfIn PDF document text
- https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/a0838ee84202f22fc6986a8c85287deb/kobiguxevosidukujibav.pdfIn PDF document text
- https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/7452f8nv4e01anmu1gnkqvbr4i/sibovatikit.pdfIn PDF document text
- https://bandai-k.com/userfiles/file/laginotogelazegenakidewas.pdfIn PDF document text
- http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/g7i7qjqd71ogg4aapms0rg9074/81922047698.pdfIn PDF document text
- https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/3ec241e60a0718896d6c9e26640b89b9/giropenop.pdfIn PDF document text
- http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aebf87b466---94063673257.pdfIn PDF document text
- http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4d1e986dd---26355971280.pdfIn PDF document text
- https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/ad3kp8tjcm8qv8671e2anahgfg/86831481632.pdfIn PDF document text
- https://delaneyllc.com/ckfinder/userfiles/files/19469369524.pdfIn PDF document text
- https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/63346c7400c9e6d22f8148048ad032d0/wudive.pdfIn PDF document text
- http://hanart21.com/files/userfiles/file/koruritiwupefagagudobiwor.pdfIn PDF document text
- http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607de6839753e---kobatuk.pdfIn PDF document text
- http://stasta.com/userfiles/file/42977893001.pdfIn PDF document text
- https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609fff160ca27---nafinagigawomopasisola.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_off0000c62d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC62D	10768 bytes
SHA-256: `0cbb573ec701ed39957a3327369560dafca24ecf753a18ced2a1d3fea8ac6a0d`
`font_01_sfnt_off0000debc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDEBC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f6ce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6CE	19060 bytes
SHA-256: `54fd8ca4bf54115f3658ab89dad9245a531043ded90169c957ab46557c85b528`

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