PDF malware analysis — malicious · 26a9e37cd247863f

MALICIOUS

PDF

95.1 KB Created: 2021-06-13 05:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31

MD5: 4f4ee56e91e8918fb431c7995ec42c16 SHA-1: e0188b900b69b0541a5718cbe1fb5583b9154d9d SHA-256: 26a9e37cd247863f1a7ef4484a1a77bb84351b4e5492b65cc6750d32c472ba68

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to potentially compromised CMS upload directories. The document body, though heavily obfuscated, suggests a lure related to a "Gentoo linux handbook". The combination of these factors strongly indicates a phishing or malware distribution attempt, likely leveraging the embedded links to redirect victims to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.8193

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://drafthe.ru/uplcv?utm_term=gentoo+linux+handbook PDF link annotation
- http://614move.com/clients/4890/File/32111149525.pdfIn PDF document text
- http://gramercygrand.ru/files/file/zatif.pdfIn PDF document text
- https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/99b23afff31425e8c54d043139aa996a/6757478423.pdfIn PDF document text
- https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/e7ee17c8bafcfa629352fcad42324282/59200042692.pdfIn PDF document text
- https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/c1f2ddbee6822a95d7b6ede25614bafb/lujutavofujuxagotitipim.pdfIn PDF document text
- https://protradingindia.net/userfiles/file/20254580050.pdfIn PDF document text
- https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c504c57648b---nupaka.pdfIn PDF document text
- http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b205240d32---42028073934.pdfIn PDF document text
- https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/ef2755b4901ba4f7e9b7567db338175d/38346740499.pdfIn PDF document text
- http://gramercy-grand.ru/files/file/65921519700.pdfIn PDF document text
- http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e63478c98---zuvikajokobedebivuxer.pdfIn PDF document text
- http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/33429629513.pdfIn PDF document text
- http://ackerviewguesthouse.com/userfiles/file/pifuvifagimaxapulele.pdfIn PDF document text
- http://expertsystemgroup.com/file_media/file_image/file/tifubededupalalowuxu.pdfIn PDF document text
- http://kangs78.com/clients/66216/File/joxozuzezodaviloxabija.pdfIn PDF document text
- http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8c0ee79df---90645696805.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000120a7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120A7	4940 bytes
SHA-256: `c90cce1714f1506a51cbd1026d0e031539a16f85d5646f8ddcf3b462c8e9b7b8`
`font_01_sfnt_off0001316f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1316F	1800 bytes
SHA-256: `51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0`
`font_02_sfnt_off000139fd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x139FD	11608 bytes
SHA-256: `950a9f42c38f41d6c06bd0113e591a78ac00934c77b61c8d82af58b78a6c7551`
`font_03_sfnt_off000161b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x161B9	16972 bytes
SHA-256: `76ca372216ebda9b38ac3e47924760a4657d88589b5bdad943b3d2c293cb2f88`

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