PDF malware analysis — malicious · a9cd0eea53c00f98

MALICIOUS

PDF

93.6 KB Created: 2021-07-02 12:24:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 8913c66446b5cbdb65ca3afc5c187468 SHA-1: 3b37ce4f10bee689f8d27f4ae31cc4d6cc01468d SHA-256: a9cd0eea53c00f9854c7a9eef5956e3eadbb7f0a076c865cca0d503d9b8e3e65

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious. It contains a link farm pointing to compromised WordPress sites, likely intended to trick users into downloading further malware. The presence of numerous external URIs and the ClamAV detection strongly suggest a phishing or trojan delivery attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

Heuristics 7

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/a7aaa0be192d5dda98aa0f0fab42765b/2159008000.pdf In PDF document text
- https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/e65c34910ef7bda9af2d283bc9739639/46393728379.pdfIn PDF document text
- https://gamedunyasi.com/calisma2/files/uploads/90913315594.pdfIn PDF document text
- https://dm288.com/slicice/file/77003097326.pdfIn PDF document text
- http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160da745992ec9---28770581738.pdfIn PDF document text
- https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/4079b0c29285aef1c581102ebad71d6c/11943630860.pdfIn PDF document text
- https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160954fa75d3bc---xuxaxefi.pdfIn PDF document text
- http://logisticsnetworks.net/ckfinder/userfiles/files/12225684268.pdfIn PDF document text
- http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/a9db8964818c5b0ff1f07bef4d6d11aa/53595311292.pdfIn PDF document text
- http://accessoriesunlimitedinc.net/catalog/file/76400029397.pdfIn PDF document text
- https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/sul7012e92ecj42e9ka3eg7fs5/85743083089.pdfIn PDF document text
- https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c3dcf60b86f---15504113418.pdfIn PDF document text
- http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/aaf9381334c0dcd76a4a09e3f8da4699/sonuvujepiwako.pdfIn PDF document text
- https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c5cba217291---fewugobipatimuwedero.pdfIn PDF document text
- https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b864d30e4fb---45306568425.pdfIn PDF document text
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/q8th14ihqs69t6a1ogq1cvrji4/80684973734.pdfIn PDF document text
- https://emauto.lv/index/images/up/file/gazekuvex.pdfIn PDF document text
- http://wohingltd.com/userfiles/pidopesoguwuvazixesabud.pdfIn PDF document text
- https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af95e54480---5164614494.pdfIn PDF document text
- https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/4o388d2lvaucumoplqo0v05ql7/49443383705.pdfIn PDF document text
- http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609da90e9fa98---62517304100.pdfIn PDF document text
- https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609af77beaec1---nemanusenasako.pdfIn PDF document text
- http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/de9ca5e693668429e5a9e26d74de8853/zosabudolinamuxuwiw.pdfIn PDF document text
- http://sakaryakasaplarodasi.org/userfiles/file/tisomalezarefibijevuv.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=success+to+ielts+by+dr+roma+free+downloadPDF 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_off0000fca2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCA2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000114b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x114B9	11152 bytes
SHA-256: `b24d45ba4963e9cb4ae9324841ac7e20d39f69e04009139a083186d07ef3a0a5`
`font_02_sfnt_off00012ed3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12ED3	25852 bytes
SHA-256: `f9ea885e560ec84a8c2a57180859457974f271dacb77f987817d11d0d4924a84`

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