PDF malware analysis — malicious · 7bc3101dfe2d4fb9

MALICIOUS

PDF

89.9 KB Created: 2021-07-26 12:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 0affa0ff559f7479612977f6e3c217f1 SHA-1: 6a232bf9a9f97a7cd3320f1981baef6917ad3a10 SHA-256: 7bc3101dfe2d4fb9ac26bab0b2eccf676417ccc30da8fa4d3b8ae6b7620c0592

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution lure. The embedded URLs and link farm heuristics indicate an attempt to redirect users to potentially malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9913

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://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7c0c03a030e8d4e3d19ccbcf769bfbd5/42320913132.pdf In PDF document text
- https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/d90su6ekhe8lb274i7v8qcjpip/84728391600.pdfIn PDF document text
- https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1be9b9c5e---molijibabotefesene.pdfIn PDF document text
- http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa8998b0ba---josolipezivedezipoz.pdfIn PDF document text
- http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab686500e06---34780295771.pdfIn PDF document text
- http://risme.vn/files/23776830664.pdfIn PDF document text
- https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160913b56718fa---88718587830.pdfIn PDF document text
- https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d054df21d30---vuwebozaviwagesene.pdfIn PDF document text
- https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/a98137f8cc4e55711ccd520f3cc2dfab/wetevagoduzor.pdfIn PDF document text
- https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/31cd0cdbefcbe12140788596a9b8ab73/ranukizeveniwam.pdfIn PDF document text
- https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/03074804fbe020e4c61f2cee2e3c30bc/98131446253.pdfIn PDF document text
- https://alternatifhirdavat.com/upload/ckfinder/files/galitozukofevutumev.pdfIn PDF document text
- https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/0879eb6ca704af9365c8e3e999f79159/33898596124.pdfIn PDF document text
- https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/6ddd4aadd0410c67c80ae638a7e1b882/11391571808.pdfIn PDF document text
- https://condicionamentofisico.com/arquivos/file/dusorufebexon.pdfIn PDF document text
- https://tckontrola.hr/files/55323055923.pdfIn PDF document text
- http://cityhigh78.com/clients/2/2d/2ddbae4fb74c169819b3574d76e4e264/File/51435670967.pdfIn PDF document text
- http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a06fd8266f8---miburamufutedebos.pdfIn PDF document text
- http://firmykominkowe.pl/Obrazki/edytor/file/sixixarenofapibudikegogi.pdfIn PDF document text
- http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160becfe623ad0---25488406576.pdfIn PDF document text
- http://knoxvillecentralhs1966.com/clients/8/8c/8c0a3a1fea337096d337135aeb812fb1/File/76481867653.pdfIn PDF document text
- http://ecohort.com/userfiles/files/87654997553.pdfIn PDF document text
- http://batiment-tunisie.com/userfiles/file/lakimepipolitodawatodita.pdfIn PDF document text
- https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca031bee13f---vejajawuj.pdfIn PDF document text
- http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5701abf1b---91897091484.pdfIn PDF document text
- http://goddesshair.net/upload/users/files/68499444194.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=octane+render+cinema+4d+r19+plugin+crackPDF 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_off0000f576.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF576	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010d8d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D8D	11084 bytes
SHA-256: `9a465f326b0f179cccfbe66c7518fd78af94e180a42a4f1fb87d5b4aff17291e`
`font_02_sfnt_off00012746.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12746	18380 bytes
SHA-256: `38f219631a324a8e4d9f1c65ad3ad05f252a331aeb4bc442bb91d9c652f84bf3`

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