PDF malware analysis — malicious · aee52db2a74f3dd7

MALICIOUS

PDF

87.6 KB Created: 2021-09-02 02:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 1f700589b5c0f625999633e2eee0b89e SHA-1: 96b93519b4f0260d08e780a6bb621d78c0fdf174 SHA-256: aee52db2a74f3dd755764e3a5a7f42d2bce41123d0e042ba3c3013b7d7ab212b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded links are indicative of an attempt to redirect users to malicious content, likely for further exploitation or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9608

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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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://indiansabroad.uk/userfiles/file/26949376475.pdf In PDF document text
- http://suncitygroup.ir/basefile/suncitygroupir/files/3103713721.pdfIn PDF document text
- http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd2847b14f---38062406247.pdfIn PDF document text
- https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/p3h4hd9e2qh7mjalsadkuj5hjh/tumemavopizupuwi.pdfIn PDF document text
- https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768daebec19---poxakefok.pdfIn PDF document text
- http://www.reeder.ee/files/filemanager/61116734819.pdfIn PDF document text
- https://adepotcustom.com/UploadFiles/file/20210617111150163.pdfIn PDF document text
- http://longarmquiltacademy.net/fckeditor/userfiles/file/diwupagomoxumebunupoke.pdfIn PDF document text
- http://ride.hu/images/uploads/files/zovolixujasupisubivapaw.pdfIn PDF document text
- https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/51f1541c66d3135da6d311f94cc97273/gubegopane.pdfIn PDF document text
- http://bioident.pl/photos_fck/file/79052769226.pdfIn PDF document text
- http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/7637270650.pdfIn PDF document text
- http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a633f1d6aff---35681462200.pdfIn PDF document text
- https://angkorphotographyguide.com/userfiles/file/baratasu.pdfIn PDF document text
- http://df-foundry.net/d/files/duduvolafej.pdfIn PDF document text
- http://www.ondebiz.com/userfiles/file/larerapozezir.pdfIn PDF document text
- http://sxcec.org/userfiles/file/81276386568.pdfIn PDF document text
- https://vhssirimpanam.org/ckfinder/userfiles/files/wujixamixududob.pdfIn PDF document text
- https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/dc44f6c3213327405bbbb1000497a20e/sosirov.pdfIn PDF document text
- http://hataylezzeti.com/resimler/files/20218165795.pdfIn PDF document text
- http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3a1a1276a---28754265490.pdfIn PDF document text
- http://fuli-capital.com/userfiles/file/zagoxenagipawosuwegip.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=due+to+pandemic+outbreakPDF link annotation
- 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_off0000ffe3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFE3	18296 bytes
SHA-256: `712f113897c07ce179bb6519e3b818fd513e054a7fa5fc4f63d1d5c3a9a386a9`
`font_01_sfnt_off00012e69.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12E69	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00014680.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14680	10792 bytes
SHA-256: `f6b80aca42b38c42ae7479359de9aa1322d43ce4a1f079725abedbe2e4aeeb77`

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