PDF malware analysis — malicious · 12006eac7ccea212

MALICIOUS

PDF

82.2 KB Created: 2021-09-05 16:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 846892cb4acae5c2f9a663c0ecda266c SHA-1: 393990c37f44fa6201544eba8d7965ff03bb5c79 SHA-256: 12006eac7ccea21220071fe6f607c7e99b964eb1e2db8a7ee1d40e9da02e3e3a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier. Heuristics indicate it functions as a link farm, pointing to numerous URLs, many hosted on compromised WordPress sites or disposable domains. The embedded URLs and link farm structure suggest an attempt to direct users to malicious content, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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 http://inwallendorf.de/userfiles/file/46151647196.pdf In PDF document text
- https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c4eec66da---3455870011.pdfIn PDF document text
- http://erulingua.hu/uploads/content_files/files/kutidimovemediz.pdfIn PDF document text
- http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765d5142aa1---towukefetuxefabot.pdfIn PDF document text
- https://hamasataccessories.com/userfiles/files/66862774056.pdfIn PDF document text
- https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a341c9cd1b---63082353822.pdfIn PDF document text
- http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e3848277d06---legamokumupewusixo.pdfIn PDF document text
- https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/a3d41457369816ba12dd43cf51b55110/62687462323.pdfIn PDF document text
- http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080c7ceb4757---zapes.pdfIn PDF document text
- https://porterbrothersltd.com/app/webroot/uploads/rutikababix.pdfIn PDF document text
- https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/28ae6a6302b550cca53b222aba7e7862/78145097825.pdfIn PDF document text
- https://wisestudentz.com/userfiles/file/92364336108.pdfIn PDF document text
- http://minhnguyenvn.com/uploads/userfiles/file/tuseminojuduwalimufa.pdfIn PDF document text
- http://industrialdevices.in/uploads/lirod.pdfIn PDF document text
- https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/e39affd2630e703f34fd1d2a7eb3aac8/seduxamozarogaguzomise.pdfIn PDF document text
- https://nepalipublisher.com/ckfinder/userfiles/files/56144728522.pdfIn PDF document text
- http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6b9b37ae4---13920412011.pdfIn PDF document text
- http://www.psoevalledeabdalajis.es/ckfinder/userfiles/files/3186152545.pdfIn PDF document text
- http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094124d7dc95---rolezij.pdfIn PDF document text
- https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/7vq47db0ir210oc8hvklh8rf02/64507024362.pdfIn PDF document text
- http://yfatc.com/userfiles/file/85138165024.pdfIn PDF document text
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b66923cdd5a---ditivazomisetumitipuf.pdfIn PDF document text
- http://ecohost.ru/pics/images/file/palatuxotavapexeli.pdfIn PDF document text
- http://backyardreleaf.ca/clients/6/6a/6a4eaaf8452764cb6fc14c9064ed0c71/File/vekozebipalowuxiv.pdfIn PDF document text
- https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/b2p8etn03ktf7v5b4s1covl7l1/kudonazawu.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=emotional+development+during+adolescence+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_off0000dcc4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCC4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f4d6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4D6	17288 bytes
SHA-256: `f27918376a6ce4e84f02fa4cdc31287c8fe7e9dca7ff8127c9cd51cd0128ac4d`
`font_02_sfnt_off00012190.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12190	11112 bytes
SHA-256: `5d08d4ede381ce4eff99ddd1881baefd3a5d3cecff58d7fef1709e87d00271f0`

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