PDF malware analysis — malicious · 43ece64b72e86529

MALICIOUS

PDF

79.8 KB Created: 2021-07-05 21:49:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: 99d18da5dadf1d8384e1679b205f3638 SHA-1: 52c4d138683a8f37a8884ea189d978ffd6f153c4 SHA-256: 43ece64b72e86529835bbfa95a733fbb7406edd140605c1ae474f00d3ca933b7

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised CMS upload directories, suggesting an attempt to host or distribute malicious content. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9940

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://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16081095c106f6---xoximali.pdf In PDF document text
- https://fivetc.net/uploads/files/junapan.pdfIn PDF document text
- https://baigiangtoanhoc.com/upload/files/balufikonimavojebozuvi.pdfIn PDF document text
- https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6a4ba1e93a3c153ba4d05ac4ca417abd/65763829420.pdfIn PDF document text
- http://brandnewgoods.net/userfiles/file/tiwanejudomuzokogap.pdfIn PDF document text
- http://barcelonasixtytwo.com/userfiles/file/latif.pdfIn PDF document text
- https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/bug23a1cncpma4l7dham9kdsqg/3350070171.pdfIn PDF document text
- https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/c81f4ff0e2aa828fb4ed9f10a431e596/kuliribelilojezuf.pdfIn PDF document text
- https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/f3fbb47920bc1764a8aacb45149eb474/1306285057.pdfIn PDF document text
- http://qunjl.com/userfiles/files/52251946127.pdfIn PDF document text
- https://amd-export.com/site/upload/file/54588281760.pdfIn PDF document text
- https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/i4ctt11fpt7ahj4fc48f4ohegu/badim.pdfIn PDF document text
- https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608c91df92534---71308891678.pdfIn PDF document text
- http://varadimasszazs.hu/uploads/files/27818493600.pdfIn PDF document text
- https://lanjutpt1.com/contents//files/pazubitonifusenezoras.pdfIn PDF document text
- https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca43f1f1a1---6104899025.pdfIn PDF document text
- http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/79ab9c2a770d71cb1eea88b1c615f8d5/53126248406.pdfIn PDF document text
- http://mfahk.com/upload/files/13865203173.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160922575d586e---64266398603.pdfIn PDF document text
- http://www.vljainandco.com/userfiles/files/35022147431.pdfIn PDF document text
- https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/559063988a83a20b9eb7df6078a2413a/54705079266.pdfIn PDF document text
- http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160db9b0d426c8---95728167007.pdfIn PDF document text
- http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec553cf897---piziradagodabub.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=wings+of+fire+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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000bf0b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBF0B	17160 bytes
SHA-256: `59351dca88ae0c62605d26c7c26217390fdb9825932ff2e09b489e3b1ba652c8`
`font_01_sfnt_off0000ebf3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBF3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001040a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1040A	10508 bytes
SHA-256: `ec529d7a12f5342d367300b90d40fb815eeb26c0ae9e34a9c24c86782fd13249`
`font_03_sfnt_off00011be0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11BE0	16172 bytes
SHA-256: `637a9dac0afc585f1f105c2de408df99420c2eea19216aca5c902ef31b2be0e3`

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