PDF malware analysis — malicious · 68822b692c79c9e0

MALICIOUS

PDF

101.1 KB Created: 2021-07-22 07:41:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: ec36fe6c957ebf3e3cc193a99b0c8ec4 SHA-1: 8b3b62108ea971c35a0449e6aa2e55af339e3076 SHA-256: 68822b692c79c9e059c0f3c8d6ff231490e1ea09527ff52d7e12dabc4c51d039

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host malicious content or redirect users to phishing sites. The presence of multiple unknown URLs associated with formcraft plugin uploads further supports this attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9877

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 http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7ca338f5d---xatuwoviz.pdf In PDF document text
- https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797523d392b---jenomafinari.pdfIn PDF document text
- http://kimyasaldubeller.com/upload/ckfinder/files/996873065.pdfIn PDF document text
- http://tangiahoang.com/skinkorea/Images_upload/files/lufogevibagerexuvexud.pdfIn PDF document text
- https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ff7c8261f---22947343986.pdfIn PDF document text
- http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7ee71ad30d---xidejuxeputudogaguxiduzug.pdfIn PDF document text
- http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c30f161b0---boleravesixusoxazufeke.pdfIn PDF document text
- http://arlingtonhigh1961.com/clients/e/ef/ef36f0800c0a5d5a0b00d5ecc8c3c6da/File/nogivujot.pdfIn PDF document text
- http://aroma--style.net/files/files/kerusesutubake.pdfIn PDF document text
- https://yildizwebpaket.com/calisma2/files/uploads/1575212093.pdfIn PDF document text
- http://hamandeggsclub.com/clients/e/ee/ee862789ee8b59d3f3d22261ccc35c80/File/71622470187.pdfIn PDF document text
- http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160c1494676e09---zofirimegilowaxujibinowa.pdfIn PDF document text
- http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/rtji0h1slnggnus60l7pt7t8ns/tenugenafed.pdfIn PDF document text
- http://thingsantiquesla.com/userfiles/files/lowixoxufobomaz.pdfIn PDF document text
- https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/c4dc09616a43a66f2321b3571255a96a/wazus.pdfIn PDF document text
- http://yalcinsezer.com/upload/ckfinder/files/degedivovaxu.pdfIn PDF document text
- https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c6373ba9435---topalabe.pdfIn PDF document text
- http://sosnovgeo.ru/userfiles/file/15864178915.pdfIn PDF document text
- https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/938b375da7362beda8917fccfe719ae6/fiwup.pdfIn PDF document text
- https://office-agglo-larochelle.fr/userfiles/file/26999852229.pdfIn PDF document text
- https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/3e33453299cc19260f8dbe2bd3d6caee/6536896813.pdfIn PDF document text
- http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f320b12b0e4---xilolavamamadixobisefes.pdfIn PDF document text
- http://tryinvest.eu/userfiles/files/nesutavatu.pdfIn PDF document text
- http://divapharma.com/uploaded/file/3720589080.pdfIn PDF document text
- https://altonika.pro/files/fck/file/51382351227.pdfIn PDF document text
- https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/48172c19dfd1fea2285aa8bf876842c3/57736955879.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=lady+gaga+sting+stand+by+mePDF 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
`stream_008_off00016560.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x16560	19324 bytes
SHA-256: `94686fb6eae14dfb199bd779bbc212487a5b2131ce8a80bb574249458cf6961a`
`font_00_sfnt_off000106d9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106D9	18148 bytes
SHA-256: `99e054e204a44691021ed88da5cc25675e48dcf663cf2e0b916095ea71e38266`
`font_01_sfnt_off00013580.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13580	10536 bytes
SHA-256: `4cde797297297374a02883cdc6524f607a383f543bc25f200d5b469d504e758e`
`font_02_sfnt_off00014d4f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14D4F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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