PDF malware analysis — malicious · 3679e718e1257741

MALICIOUS

PDF

81.5 KB Created: 2021-07-17 03:14:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 091d9f38bfa6dc973b18e3e8743df95f SHA-1: 0c8eb33c0109c97feec269b11ad7053ac8a87fe4 SHA-256: 3679e718e125774106e7b63fbfeffd37c832457503816c3ff9210ddcbb6a2c8c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The presence of multiple PDF-specific heuristics related to URI and link farms supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

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://sharadsangam.org/UserFilesTwo/file/87770133116.pdf In PDF document text
- http://espacioschillout.es/images/admin/file/bofudavoz.pdfIn PDF document text
- http://mldinsaat.com/image/files/76513037469.pdfIn PDF document text
- https://777mto.com/contents//files/94998687157.pdfIn PDF document text
- https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/hfllm1clgsjidrq9ib5j6pgmkj/perixilokavipogek.pdfIn PDF document text
- https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/ctr4b05nagc2bpmd4g5eq1eedj/76652741898.pdfIn PDF document text
- http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/302dac2dd0440d0cc26ef25f47584729/68530974818.pdfIn PDF document text
- https://jancsoalapitvany.hu/ckfinder/userfiles/files/1457498387.pdfIn PDF document text
- http://ajivikafinance.com/userfiles/file/kusimuparotekowalefebopo.pdfIn PDF document text
- http://absolutelyneon.com/userfiles/file/45267226716.pdfIn PDF document text
- https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/c1ea4598d6d26bdfdbf86429a5fead6e/92382357077.pdfIn PDF document text
- http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad4c6b71ae---13513473627.pdfIn PDF document text
- http://stavclearing.ru/upload/files/74407560694.pdfIn PDF document text
- http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/zulilave.pdfIn PDF document text
- http://blpest.com/UserFiles/file/1418377742.pdfIn PDF document text
- https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/22c7fa348768d3b808941e62f372ef5c/46806259968.pdfIn PDF document text
- http://daoltrading.com/userData/board/file/fevizogukapidekew.pdfIn PDF document text
- https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/eeca99ef80d7feedadb9886482a251f9/23955701170.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb155167b9---20875439119.pdfIn PDF document text
- https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/25f4dfa8c9792e0e944fc4839b87e4d4/fazodagagivaxalupimanulo.pdfIn PDF document text
- http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7076a0918---83418941498.pdfIn PDF document text
- https://nicosiacaffe.it/file/88339326942.pdfIn PDF document text
- https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/85f96aee60c8412916123ca49fc76cf3/bivulawe.pdfIn PDF document text
- http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f7e4ef0db---lisozobimoxebo.pdfIn PDF document text
- http://zoop-tech.com/ckfinder/userfiles/files/16433230915.pdfIn PDF document text
- http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb7ee8c7ef4---65497933100.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=pharmacy+alligation+problemsPDF 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_off0000d905.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD905	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f11c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF11C	11076 bytes
SHA-256: `f61a67fa11d99f541e761a41003876de91e0c018fa23e5191d852ac7879a9c71`
`font_02_sfnt_off00010a87.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A87	17580 bytes
SHA-256: `2e0234d4121b9814f94f6ec158649620c3e54ffccfdb3c46a4bbfcde15e8f0de`

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