PDF malware analysis — malicious · 6ce82dae7a8af891

MALICIOUS

PDF

89.7 KB Created: 2021-09-01 01:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: f29f10f827d0ec0c5a3d01cd5cbf5673 SHA-1: 2ae0c087b1e7e2b8b05cec925d2600f1e148e090 SHA-256: 6ce82dae7a8af891595a688fac0f9ee2bc328df33f65bcfcbc73a4b885631e95

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The file contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to distribute phishing content or malware. The presence of these links and the overall structure strongly suggest an attempt to redirect users to malicious destinations.

Machine Learning

Nyx PDF Classifier malicious score 0.9905

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://laborke.ru/uplcv?utm_term=goat+cheese+and+pear+pizza PDF link annotation
- http://sheilahancock.net/blogfck/file/49135149311.pdfIn PDF document text
- http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cfe71ae1e1c---94259600646.pdfIn PDF document text
- https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/7ed48cee421053d397cd2f42deb150ba/panokarinipowid.pdfIn PDF document text
- https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/8278e53a8181466b49f876be3e8b7508/9255073086.pdfIn PDF document text
- http://pointerboards.com/uploads/admin/files/dajudojunoxuzumafikomojo.pdfIn PDF document text
- https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/40e277f8a4b94011c3c1f56cfe64b764/zikopomonupagiladiraved.pdfIn PDF document text
- https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/2401d7c4cdf8afa9865dfc254d636295/68192021023.pdfIn PDF document text
- http://medizator.ru/ckfinder/userfiles/files/4545562172.pdfIn PDF document text
- http://gtshotel.it/images/file/34329776249.pdfIn PDF document text
- https://j26clean.com/upload/files/91461392917.pdfIn PDF document text
- https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075bd82ec26d---98547130410.pdfIn PDF document text
- https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a93d4e19fe2---tipoxejinebakumuvemijik.pdfIn PDF document text
- http://jnafarms.com/clients/864068/File/29305479040.pdfIn PDF document text
- http://nextgt.eu/uploads/file/71709628027.pdfIn PDF document text
- http://www.toeterloeh44.de/files/nonalijowenepifibam.pdfIn PDF document text
- http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16097684d38029---51469768272.pdfIn PDF document text
- http://tecresconsolidamentorestauro.it/fck_data/file/98555223014.pdfIn PDF document text
- http://reclameindex.nl/images/uploads/fupupajurer.pdfIn PDF document text
- http://botosani.ro/img/uploads/file/voduzade.pdfIn PDF document text
- https://areicon.com/images/file/43259213171.pdfIn PDF document text
- https://svrcontractors.com/wp-content/plugins/super-forms/uploads/php/files/4990debfcbd51e3967dfdbdc80a4cfb5/87828538034.pdfIn PDF document text
- https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/7f160c21b6f1c7d87109aa70a5083f20/8628565478.pdfIn PDF document text
- https://poojaindiangrill.com/nbloom/fckuploads/file/80058776232.pdfIn PDF document text
- https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/d0808cb90edb43769e845b164d934575/sixeguruxezijutugozix.pdfIn PDF document text
- https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c3228db50af046b58f1572b0fd2f0be1/78539635694.pdfIn PDF document text
- http://uss100.com/clients/5/56/562308f4da1da23328cfd9e5c9f3e68f/File/41372254841.pdfIn PDF document text
- http://debden.org/userfiles/file/rakisajegajefu.pdfIn PDF document text
- https://wonkingchina.com/d/files/49775303126.pdfIn PDF document text
- 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_off0000f4ff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4FF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010d16.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D16	10664 bytes
SHA-256: `df24d50e5cdd5c43e47b25ee3867ba443f50ec62e71cf418047b847f5f2a6137`
`font_02_sfnt_off00012587.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12587	18644 bytes
SHA-256: `bedaa13e7f63e11bffb3b3fdb8c17a5d880d5f9300a0dbb8640f7e79b391b948`

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