PDF malware analysis — malicious · 45c32a8f1f94f622

MALICIOUS

PDF

100.0 KB Created: 2021-08-11 21:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 484bac3f660bfb4fa632b60ff1c1803e SHA-1: 0ddcfc02c45702440e449f1488eaec89f2f4453c SHA-256: 45c32a8f1f94f6224744ac4b46e5783c002272e21b7eb711682a614f51f407a2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file functions as a link farm, with numerous embedded URLs pointing to various websites, some of which are hosted on compromised CMS platforms. This pattern is commonly used for phishing or to distribute further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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 http://eclickapps.in/userfiles/files/jemufokem.pdf In PDF document text
- http://daydreamspin.com/userfiles/file/35188604475.pdfIn PDF document text
- http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b9dcc24af7b---derak.pdfIn PDF document text
- https://ahha.az/userfiles/file/96669918404.pdfIn PDF document text
- https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/fb31e67a53968f270159c1187b4a1649/mivekivazesem.pdfIn PDF document text
- http://aydinservis.com/ckfinder/userfiles/files/67191462808.pdfIn PDF document text
- http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da996a1f26c---naromapukexus.pdfIn PDF document text
- http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160770e792a5bc---5131712206.pdfIn PDF document text
- http://dagmare.de/userfiles/file/13642397117.pdfIn PDF document text
- https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/7ed991aa47ab628102a69a0e999969c9/guzolorunuxuloziz.pdfIn PDF document text
- https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/0f9f5694ce4676739bf09231cc7815fe/nezerobef.pdfIn PDF document text
- https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/1631bfefe731c64837f572822b0c7690/23010575809.pdfIn PDF document text
- http://dorrstrechy.cz/UserFiles/File/zebelefovujet.pdfIn PDF document text
- http://inncredel.com/uploads/47875580990.pdfIn PDF document text
- https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/b7a10c40d31237a0d60c6e3ab533c170/bapoxuzigizon.pdfIn PDF document text
- http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xomikijate.pdfIn PDF document text
- http://zdrowejaja.com/Upload/file/lakefalagesejiwitubu.pdfIn PDF document text
- https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/uvk5sd5jhfle60q8m0i0derarg/mujezafiwoxob.pdfIn PDF document text
- https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c73f280c39e---rafezefumuvotazoki.pdfIn PDF document text
- https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/d3f8ccdcdde993f1b3fb478a435889ea/xogajukajusi.pdfIn PDF document text
- https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/3490256d6ef0924a8d079a4497984b06/85449322586.pdfIn PDF document text
- https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/fdc1171e5d14ffb6f9bbe2f8c4724708/damemasulavulolumejewe.pdfIn PDF document text
- https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f4eb0043f---85515406719.pdfIn PDF document text
- http://cy2hand.com/userfiles/7430963513.pdfIn PDF document text
- https://rajatotogroup1.com/contents//files/fanes.pdfIn PDF document text
- http://stigstudiotecnico.it/userfiles/files/3645057932.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=tyt+matematik+2.dereceden+denklemler+testPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00011b7f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B7F	10768 bytes
SHA-256: `ddf80f187bad0ee3124d626af7709a871ddbd76828832e8dba12cbb8e539a333`
`font_01_sfnt_off00013448.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13448	20784 bytes
SHA-256: `fb39eb4712e64235b8a57b3512b73a4084b87dffe10c1df8227749a93b35127a`
`font_02_sfnt_off000167ce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x167CE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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