PDF malware analysis — malicious · 1fc8c5f8d30a26bb

MALICIOUS

PDF

104.3 KB Created: 2021-06-25 23:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: 048e4971f8d8b318f219d99e3b0f3115 SHA-1: 89ab2f2b7e9a04429e1ecd69e0dc402eb15027b4 SHA-256: 1fc8c5f8d30a26bb1679b88a6c991ae1f6adf8e2c38d6fb669dd68908ced1914

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, likely facilitates the redirection to these malicious URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.9934

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://philabc.ru/uplcv?utm_term=sartre+meaning+of+life PDF link annotation
- https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/2502de2cc9d3e8897a6519e106123f6a/jejumufixaxu.pdfIn PDF document text
- https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608713548ef37---zobupopuwod.pdfIn PDF document text
- https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/3a2487676541f256a9c8b690d9baef83/26987341911.pdfIn PDF document text
- https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/d862912b970b3a405d1b278d00a16a67/83743003379.pdfIn PDF document text
- https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/b50cb84cb6db4157ce856e3d4066fd1e/rataturisiwibozaj.pdfIn PDF document text
- http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5cbf34464---68266487303.pdfIn PDF document text
- https://chameleoncoupons.com/adgprocessing/uploads/files/wazunasimitobuxisuki.pdfIn PDF document text
- http://aceonlinementors.com/userfiles/file/kugamijemizaviberowonexu.pdfIn PDF document text
- https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5f105e33f---tetinaru.pdfIn PDF document text
- http://tuzvedo.hu/elemek/file/5909400795.pdfIn PDF document text
- https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/bm7ql1mash15g6bacap3tdpb9a/59622210141.pdfIn PDF document text
- http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/9abb8bbf3ce5019e4d4db9feb06d7d45/98031178819.pdfIn PDF document text
- http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec40984abe---60066966742.pdfIn PDF document text
- http://meijialx.com/ckfinder/userfiles/files/58553805944.pdfIn PDF document text
- https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/60c7f54fa0ad1ec04ba6f06cbc647f03/2143295919.pdfIn PDF document text
- https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff0e29aab0---renugapofin.pdfIn PDF document text
- https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/98d24903d1de3663aae3e4f32364a790/85297719651.pdfIn PDF document text
- https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/nosejokimawowixapaxovera.pdfIn PDF document text
- http://www.jindatunnel.com/up_files/file/zorutekorap.pdfIn PDF document text
- http://mountcalvary76.com/clients/9/90/9062e1c9f2360b2cedac6e2854879500/File/4018605155.pdfIn PDF document text
- http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a45d57deb1a---dopinojosopixit.pdfIn PDF document text
- http://bawaconstructions.com/editorData/file/gozukup.pdfIn PDF document text
- http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3132b9920---juwajinevonawevebe.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_off00013362.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13362	18972 bytes
SHA-256: `ec86be513cf7bd5ff6dc162f71d21ca4ab861191f94bfe98de293cb4d960cc8d`
`font_01_sfnt_off000162bd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x162BD	10464 bytes
SHA-256: `db540a649d5bd1fa4f1d6ea255f9fe2421fde997bbdf97bb9b476dcc85173bea`
`font_02_sfnt_off00017a7b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17A7B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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