PDF malware analysis — malicious · 60b6bff39c4a5b7c

MALICIOUS

PDF

88.5 KB Created: 2021-06-25 21:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 0093585aa1cf5d991a5fa65075b705aa SHA-1: 5b696aed92817a15ee6b71278ef1f2d2edb5c391 SHA-256: 60b6bff39c4a5b7cbd57ee35d4b9de807682b0f769e7ee9f8e89ae0da6c418f6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to compromised websites, specifically leveraging WordPress upload directories, suggesting an attempt to redirect users to malicious content. The presence of a link farm on disposable hosting further supports a malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b3558f62767---7023175855.pdf In PDF document text
- https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/7s1r27gejg78a3vf8co0ajcf88/27786952438.pdfIn PDF document text
- https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f301002404---nitawadogipapivurep.pdfIn PDF document text
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160c5038ae546f---96148395615.pdfIn PDF document text
- http://bracyfamilyreunion.com/clients/c/c2/c2db1a97f769835965582c74015c7782/File/nuwupinelu.pdfIn PDF document text
- http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ed65757ab---81228923248.pdfIn PDF document text
- http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b58ea528f66---28988655016.pdfIn PDF document text
- https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075a14b7e509---dolatewagagi.pdfIn PDF document text
- https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c24277f17---16567804641.pdfIn PDF document text
- https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b5cc1b157---45975983183.pdfIn PDF document text
- https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/7tlrfm7ibv8o1baf1sjkkq91vg/1527773294.pdfIn PDF document text
- https://angkortaxiservice.com/userfiles/file/timataluweri.pdfIn PDF document text
- https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9f517109e---jejugumokonawagivajuliva.pdfIn PDF document text
- https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/357ba74971380175d7c49b0cfbf814c2/jarowuwane.pdfIn PDF document text
- https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/f5a8a95b774753182406bc6dd36e3787/lakeferif.pdfIn PDF document text
- https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a27c4314c64---99566072625.pdfIn PDF document text
- http://maremio.ru/admin/ckfinder/userfiles/files/wenaxevukoxudaxaxaladapa.pdfIn PDF document text
- http://cinstech-inspect-survey.com/fckeditor_userfiles/file/43360948792.pdfIn PDF document text
- http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d2d2a6e55---79514597249.pdfIn PDF document text
- http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/gnhf3kbl8c077ksgb0q3t1jno6/mebat.pdfIn PDF document text
- http://drapikowski.pl/uploaded/fck_files/file/rilebiwovebarapubiwewoxog.pdfIn PDF document text
- http://myucmas.com/userfiles/file/83760869391.pdfIn PDF document text
- http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b805af7a859---dozomavavofopigov.pdfIn PDF document text
- https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/3dfa6d2a0fb038fe1bb5f17ac392e50d/27907174101.pdfIn PDF document text
- https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/bdbqt570svjmfhgit6i2gphi31/13240653825.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=what+is+tpr+in+educationPDF 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_off0000f889.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF889	16796 bytes
SHA-256: `cf9ffb52ea604ab65c627f70363cd9a8724ccfe0c7f9f75582d674fc35522bf2`
`font_01_sfnt_off00012457.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12457	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013c6e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13C6E	10660 bytes
SHA-256: `841fc750eb176f835bf5d2c8b7fbb121e50cbc426bd7f3b0b8dc28111ded35dd`

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