PDF malware analysis — malicious · 1e2c41f7b37020d3

MALICIOUS

PDF

82.8 KB Created: 2021-09-02 15:33:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 156abe7197c4e6a9ab117de8bbf45359 SHA-1: c87cd1d3fc8ba66084675423c417b06659880694 SHA-256: 1e2c41f7b37020d375ef9a032855eaec8a78b94c6d789c8899fe183478c7d971

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with multiple heuristics indicating it's a link farm hosted on compromised or disposable domains. The embedded URLs, such as http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2f9c75099---86006850572.pdf, are likely intended to redirect users to phishing sites or download further malicious content. No scripts were extracted, but the PDF structure and URL patterns are consistent with phishing lures.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609845e74ed33---18228691463.pdf In PDF document text
- https://kawanmto.info/contents//files/61068247976.pdfIn PDF document text
- http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe29506749---1186691075.pdfIn PDF document text
- https://rinducm1.com/contents//files/guvagukaxosixojopuxipa.pdfIn PDF document text
- http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607273f278ada---88655310788.pdfIn PDF document text
- http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2f9c75099---86006850572.pdfIn PDF document text
- https://mintedimages.com/ckfinder/userfiles/files/bitovodidofawojogub.pdfIn PDF document text
- https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/0b9b249308fde330892abeb5d42346f0/deviguli.pdfIn PDF document text
- http://www.tsahimmongol.com/uploads/images/files/63190164701.pdfIn PDF document text
- https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/ba1b848e79ee71e74f52fb9f1011be2d/54195349232.pdfIn PDF document text
- https://sfilatinogourmet.it/file/20062200896.pdfIn PDF document text
- http://ehomeforeclosure.org/images/file/22501322072.pdfIn PDF document text
- http://campbellelectronics.com/uploads/64147354165.pdfIn PDF document text
- http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f6eebd5ab---50709937556.pdfIn PDF document text
- https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/ispabn4vfkj8s7u1b9n3r5h2s0/fesekudesoxaxibere.pdfIn PDF document text
- http://showplus.ae/userfiles/files/67727768216.pdfIn PDF document text
- https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e415a0489---jurixabigiwevudebebutoz.pdfIn PDF document text
- http://belgium-ex.com/images/blog//file/dewelebenexovegol.pdfIn PDF document text
- https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/r7a7d9kcq3bs8jqcjdol1cjks6/87101981746.pdfIn PDF document text
- http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825673a9146---37078625475.pdfIn PDF document text
- http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160acebe24adf2---88445049343.pdfIn PDF document text
- https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/8c3387de9bc48e23b8d03ef14cf540c0/84248655553.pdfIn PDF document text
- http://www.olivier-frey.ch/user/web/file/bipoxodirobo.pdfIn PDF document text
- https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac52db13603---xobegajexepujogaka.pdfIn PDF document text
- https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/68b74buje7ak27d26u2mecuu79/11550708140.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=name+numerology+chart+pdfPDF 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_off0000dd0b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD0B	18288 bytes
SHA-256: `01247689fc2b1ab606e2cb9ecea0261d9d01ff2596a72b89558cc3d89fba0af3`
`font_01_sfnt_off00010cca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CCA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000124e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x124E1	10996 bytes
SHA-256: `6f372f78e0cc838c123e087d9f8d3bcb35948afc14feb79c365025963806d538`

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