PDF malware analysis — malicious · c014e93461f448d7

MALICIOUS

PDF

79.7 KB Created: 2021-09-19 18:20:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: f3e6a150abab2bcd07a0d7b9b45f02d7 SHA-1: 711c45ef41f40003f58dc3a4ae4f606ba1e3076b SHA-256: c014e93461f448d7b080a7c2bc35075b5d733f58c40a3f5c008c1c5bde8e03a4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the nature of the links strongly indicate an attempt to lure users to potentially harmful websites, likely for credential harvesting or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9911

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://huntic.ru/uplcv?utm_term=last+day+rules+survival+hack+android PDF link annotation
- http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161442705dc40c---17483068314.pdfIn PDF document text
- https://valenciamaids.com/userfiles/files/39263958129.pdfIn PDF document text
- https://tvsporedi.si/vsebina/zuwedanimirijakoxelevi.pdfIn PDF document text
- https://cremyco.com/app/webroot/docs/file/20805805309.pdfIn PDF document text
- http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/160488441.pdfIn PDF document text
- https://przygodanaukrainie.pl/admin/ckfinder/userfiles/files/murudotarisepukuli.pdfIn PDF document text
- https://ehbo-oostkapelle.nl/userfiles/file/20679481431.pdfIn PDF document text
- http://shukokai-voves.fr/userfiles/file/22566129487.pdfIn PDF document text
- http://marcth.pl/media/fck/file/mugixuko.pdfIn PDF document text
- http://nenayu.com/filespath/files/20210909092740.pdfIn PDF document text
- http://taociren.com/upload/file/210904215034400126lgm38v483x7m.pdfIn PDF document text
- https://energooptima.hu/upload/File/xagitewinanatogikowonisi.pdfIn PDF document text
- https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/9343cc259026a06f711508388dac2939/jufovu.pdfIn PDF document text
- https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141ff43ef25e---10034318291.pdfIn PDF document text
- http://logtech.cz/foto/Image/file/mozelesusugegav.pdfIn PDF document text
- https://grdr.org/paidel/ckfinder/userfiles/files/9347940703.pdfIn PDF document text
- http://neteyes.eu/editor_up/pipodogezaxux.pdfIn PDF document text
- https://sofanet.ro/ckfinder/userfiles/files/12380490409.pdfIn PDF document text
- http://carbontuning.ru/file/25747546984.pdfIn PDF document text
- http://adance0112.com/upfile/editor/file/67112623166.pdfIn PDF document text
- http://bilafafafa.com/shopadmin/upload/files/9153897868.pdfIn PDF document text
- http://2015.letnifestiwal.pl/ckfinder/userfiles/files/vipopunemelatona.pdfIn PDF document text
- https://rugerwafers.com/demo/ruger/beta/userfiles/files/zemerekiromunodudos.pdfIn PDF document text
- http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/47914815007.pdfIn PDF document text
- http://ongxoanhdpe.vn/upload/files/zasejesibuvusaw.pdfIn PDF document text
- http://mikailang.net/userfiles/file/20210909125218_1671518772.pdfIn PDF document text
- http://grandwatergatehotel.com/upfile_hotel/files/6135364046.pdfIn PDF document text
- http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/8b1b10f56cf547cf6a87d08f252d17b0/metomarowu.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_off0000d1d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD1D2	17744 bytes
SHA-256: `8c556b3341b5982f794d2454d650fba2415339ff4494a232200e6978080afac6`
`font_01_sfnt_off0000ffb6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFB6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000117cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x117CD	10796 bytes
SHA-256: `5c098ed85c9c4345350b17b46d3da02deb26d3d03aefab53ad67a988a5f7e153`

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