PDF malware analysis — malicious · 8cc174fafafface4

MALICIOUS

PDF

88.9 KB Created: 2021-06-28 14:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: c5eb1892f09f43a5dfc54feed73c0802 SHA-1: e71e71f1147d48b51ce0620687006aac1375363e SHA-256: 8cc174fafafface4506f307109196fed8fcacf76e1102af3961f5eb082c5062b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF document that contains numerous embedded URLs, many of which point to compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9952

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://huntic.ru/uplcv?utm_term=chess+puzzle+with+answer PDF link annotation
- https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/72d490a88cd85a9294fe2f2587c4ec93/14696452394.pdfIn PDF document text
- https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/6db93874d13dea724a5903bcd3830d86/2769976829.pdfIn PDF document text
- https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/n7qd1ttvdp0j6l5gei9bqh8bd3/podijejazufapozu.pdfIn PDF document text
- http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6625543ed---92757023482.pdfIn PDF document text
- https://prairieroseclothiers.com/FCKeditor/file/rapobogegi.pdfIn PDF document text
- https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/1ef330f5606a781efa343cd130ec3639/xeforade.pdfIn PDF document text
- https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/be20ccba119403e80ba40f9d36d9c780/desabuluvajovojipexoriwid.pdfIn PDF document text
- https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/4c69a232ecd21cdccf5fb9e689f6a1ae/41830591987.pdfIn PDF document text
- http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160772be47660d---momademenegekuzazamufima.pdfIn PDF document text
- http://centralwestwoodclassof1983.com/clients/c/cd/cd4b3c89dd1500142a52f05b9125c350/File/lelonemivenux.pdfIn PDF document text
- http://staropolski.net/Upload/file/74407075686.pdfIn PDF document text
- https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/1490854f773c37c1aeddd77b41459b82/zezonilirosegifave.pdfIn PDF document text
- https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4a7733d2519a064f662d34d056f35171/vupegodej.pdfIn PDF document text
- https://louvre.lv/res/wysiwyg/file/2836165352.pdfIn PDF document text
- http://tipiland.net/upload/file/pikoremaxawevozezufidek.pdfIn PDF document text
- https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/c6oh70ogetfaavr7o6npijjsn5/tidenuvotagiv.pdfIn PDF document text
- http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b18e175203b---bepamotixunugo.pdfIn PDF document text
- https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/5574529c0349e2cde50cb8d4a84cd6cd/6518147779.pdfIn PDF document text
- http://vet-arrighicolangelicristilli.eu/userfiles/files/28227030966.pdfIn PDF document text
- http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b3588e16902---metezufusidufi.pdfIn PDF document text
- http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a921b6b03f8---373714044.pdfIn PDF document text
- https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095efd388712---62575256940.pdfIn PDF document text
- http://airconbank.com/upload/fckeditor/file/tenirufupunebifufopabe.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_off0000f7a4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF7A4	18756 bytes
SHA-256: `b19a1718185e339c3bb9bccedfb10f9cd9bc2e9f7772364fd5be06cbdfb3785d`
`font_01_sfnt_off000126ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x126AD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013ec4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13EC4	10508 bytes
SHA-256: `b4ae154b8f0081bf67973452c6762d3eee1c7113c65d4e75c52f0120def0554a`

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